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Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Plasmonic graphene transparent conductors.  

SciTech Connect (OSTI)

Plasmonic graphene is fabricated using thermally assisted self-assembly of silver nanoparticles on graphene. The localized surface-plasmonic effect is demonstrated with the resonance frequency shifting from 446 to 495 nm when the lateral dimension of the Ag nanoparticles increases from about 50 to 150 nm. Finite-difference time-domain simulations are employed to confirm the experimentally observed light-scattering enhancement in the solar spectrum in plasmonic graphene and the decrease of both the plasmonic resonance frequency and amplitude with increasing graphene thickness. In addition, plasmonic graphene shows much-improved electrical conductance by a factor of 2-4 as compared to the original graphene, making the plasmonic graphene a promising advanced transparent conductor with enhanced light scattering for thin-film optoelectronic devices.

Xu, G.; Liu, J.; Wang, Q.; Hui, R.; Chen, Z.; Maroni, V. A.; Wu, J. (Materials Science Division); (Univ. Kansas)

2012-01-01T23:59:59.000Z

2

Zinc oxyfluoride transparent conductor  

DOE Patents [OSTI]

Transparent, electrically conductive and infrared-reflective films of zinc oxyfluoride are produced by chemical vapor deposition from vapor mixtures of zinc, oxygen and fluorine-containing compounds. The substitution of fluorine for some of the oxygen in zinc oxide results in dramatic increases in the electrical conductivity. For example, diethyl zinc, ethyl alcohol and hexafluoropropene vapors are reacted over a glass surface at 400.degree. C. to form a visibly transparent, electrically conductive, infrared reflective and ultraviolet absorptive film of zinc oxyfluoride. Such films are useful in liquid crystal display devices, solar cells, electrochromic absorbers and reflectors, energy-conserving heat mirrors, and antistatic coatings.

Gordon, Roy G. (Cambridge, MA)

1991-02-05T23:59:59.000Z

3

Nanostructured Transparent Conductors Have Potential for Thin-Film Photovoltaics (Fact Sheet)  

SciTech Connect (OSTI)

Possible alternatives to transparent conductors show promise for enabling new processes and reducing costs.

Not Available

2012-08-01T23:59:59.000Z

4

Magnetically coupled electromagnetically induced transparency analogy of dielectric metamaterial  

SciTech Connect (OSTI)

In this manuscript, we experimentally demonstrate magnetically coupled electromagnetically induced transparency (EIT) analogy effect inside dielectric metamaterial. In contrast to previous studies employed different metallic topological microstructures to introduce dissipation loss change, barium strontium titanate, and calcium titanate (CaTiO{sub 3}) are chosen as the bright and dark EIT resonators, respectively, due to their different intrinsic dielectric loss. Under incident magnetic field excitation, dielectric metamaterial exhibits an EIT-type transparency window around 8.9?GHz, which is accompanied by abrupt change of transmission phase. Numerical calculations show good agreement with experiment spectra and reveal remarkably increased group index, indicating potential application in slow light.

Zhang, Fuli, E-mail: fuli.zhang@nwpu.edu.cn; He, Xuan [Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of Science, Northwestern Polytechnical University, Xi'an 710072 (China); Zhao, Qian [State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084 (China); Lan, Chuwen; Zhou, Ji [State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Zhang, Weihong, E-mail: zhangwh@nwpu.edu.cn; Qiu, Kepeng [School of Mechanical Engineering, P.O. Box 552, Northwestern Polytechnical University, Xi'an 710072 (China)

2014-03-31T23:59:59.000Z

5

Plasmonic Metamaterials and Nanocomposites with the Narrow Transparency Window Effect in Broad Extinction Spectra  

E-Print Network [OSTI]

Plasmonic Metamaterials and Nanocomposites with the Narrow Transparency Window Effect in Broad from 400 nm to 5 m but exhibit a narrow transparency window centered at a given wavelength. The main be designed as a solution, nanocomposite film or metastructure. The principle of the formation

Demir, Hilmi Volkan

6

Magnetically Mediated Transparent Conductors: In2O3 Doped with Mo J. E. Medvedeva*  

E-Print Network [OSTI]

Magnetically Mediated Transparent Conductors: In2O3 Doped with Mo J. E. Medvedeva* Department August 2006) First-principles band structure investigations of the electronic, optical, and magnetic properties of Mo- doped In2O3 reveal the vital role of magnetic interactions in determining both

Medvedeva, Julia E.

7

Copper and Transparent-Conductor Reflectarray Elements on Thin-Film Solar Cell Panels  

E-Print Network [OSTI]

This work addresses the integration of reflectarray antennas (RA) on thin film Solar Cell (SC) panels, as a mean to save real estate, weight, or cost in platforms such as satellites or transportable autonomous antenna systems. Our goal is to design a good RA unit cell in terms of phase response and bandwidth, while simultaneously achieving high optical transparency and low microwave loss, to preserve good SC and RA energy efficiencies, respectively. Since there is a trade-off between the optical transparency and microwave surface conductivity of a conductor, here both standard copper and transparent conductors are considered. The results obtained at the unit cell level demonstrates the feasibility of integrating RA on a thin-film SC, preserving for the first time good performance in terms of both SC and RA efficiency. For instance, measurement at X-band demonstrate families of cells providing a phase range larger than 270{\\deg} with average microwave loss of -2.45dB (resp. -0.25dB) and average optical transpa...

Dreyer, Philippe; Nicolay, Sylvain; Ballif, Christophe; Perruisseau-Carrier, Julien

2013-01-01T23:59:59.000Z

8

Metamaterials  

DOE Patents [OSTI]

One exemplary metamaterial is formed from a plurality of individual unit cells, at least a portion of which have a different permeability than others. The plurality of individual unit cells are arranged to provide a metamaterial having a gradient index along at least one axis. Such metamaterials can be used to form lenses, for example.

Smith, David R.; Schurig, David; Starr, Anthony F.; Mock, Jack J.

2014-09-09T23:59:59.000Z

9

Homogeneous bilayer graphene film based flexible transparent conductor Seunghyun Lee, Kyunghoon Lee, Chang-Hua Liu and Zhaohui Zhong*  

E-Print Network [OSTI]

conductors due to its low opacity, high carrier mobility and flexible structure. Multi-layer graphene or stacked single layer graphenes have been investigated in the past but both have their drawbacks. The uniformity of multi-layer graphene is still questionable, and single layer graphene stacks require many

Zhong, Zhaohui

10

DOE Science Showcase - Metamaterials | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

DOE Science Showcase - Metamaterials DOE Science Showcase - Metamaterials Metamaterials are a new class of artificially-structured materials that provides the ability to manipulate the flow of electromagnetic energy in ways that are not achievable with natural materials. These materials represent a new frontier in materials science. For more information about new devices being developed with these metamaterials, see In the OSTI Collections: Metamaterials, by Dr. William Watson, Physicist, OSTI staff. Metamaterial Optical Cavities Image credit: Lawrence Berkeley National Laboratory First 3-D nanoscale optical cavities from metamaterials, Eureka Alert Improving on the amazing: Ames Laboratory scientists seek new conductors for metamaterials, Ames Laboratory Related Metamaterials research results documents from DOE Databases

11

Terahertz metamaterials  

DOE Patents [OSTI]

Terahertz metamaterials comprise a periodic array of resonator elements disposed on a dielectric substrate or thin membrane, wherein the resonator elements have a structure that provides a tunable magnetic permeability or a tunable electric permittivity for incident electromagnetic radiation at a frequency greater than about 100 GHz and the periodic array has a lattice constant that is smaller than the wavelength of the incident electromagnetic radiation. Microfabricated metamaterials exhibit lower losses and can be assembled into three-dimensional structures that enable full coupling of incident electromagnetic terahertz radiation in two or three orthogonal directions. Furthermore, polarization sensitive and insensitive metamaterials at terahertz frequencies can enable new devices and applications.

Peralta, Xomalin Guaiuli; Brener, Igal; O'Hara, John; Azad, Abul; Smirnova, Evgenya; Williams, John D.; Averitt, Richard D.

2014-08-12T23:59:59.000Z

12

Active Terahertz Metamaterial Devices  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Active Terahertz Metamaterial Devices Active Terahertz Metamaterial Devices Active Terahertz Metamaterial Devices Metamaterial structures are taught which provide for the modulation of terahertz frequency signals. Available for thumbnail of Feynman Center (505) 665-9090 Email Active Terahertz Metamaterial Devices Metamaterial structures are taught which provide for the modulation of terahertz frequency signals. Each element within an array of metamaterial (MM) elements comprises multiple loops and at least one gap. The MM elements may comprise resonators with conductive loops and insulated gaps, or the inverse in which insulated loops are present with conductive gaps; each providing useful transmissive control properties. The metamaterial elements are fabricated on a semiconducting substrate configured with a

13

Graphene in a photonic metamaterial  

Science Journals Connector (OSTI)

We demonstrate a photonic metamaterial that shows extraordinary sensitivity to the presence of a single atomic layer of graphene on its surface. Metamaterial's optical transmission...

Papasimakis, Nikitas; Luo, Zhiqiang; Shen, Ze Xiang; De Angelis, Francesco; Di Fabrizio, Enzo; Nikolaenko, Andrey E; Zheludev, Nikolay I

2010-01-01T23:59:59.000Z

14

Programmable Mechanical Metamaterials  

E-Print Network [OSTI]

We create mechanical metamaterials whose response to uniaxial compression can be programmed by lateral confinement, allowing monotonic, non-monotonic and hysteretic behavior. These functionalities arise from a broken rotational symmetry which causes highly nonlinear coupling of deformations along the two primary axes of these metamaterials. We introduce a soft mechanism model which captures the programmable mechanics, and outline a general design strategy for confined mechanical metamaterials. Finally, we show how inhomogeneous confinement can be explored to create multi stability and giant hysteresis.

Bastiaan Florijn; Corentin Coulais; Martin van Hecke

2014-07-17T23:59:59.000Z

15

Progress in Superconducting Metamaterials  

E-Print Network [OSTI]

We review progress in the development and applications of superconducting metamaterials. The review is organized in terms of several distinct advantages and unique properties brought to the metamaterials field by superconductivity. These include the low-loss nature of the meta-atoms, their compact structure, their extraordinary degree of nonlinearity and tunability, magnetic flux quantization and the Josephson effect, quantum effects in which photons interact with quantized energy levels in the meta-atom, as well as strong diamagnetism.

Philipp Jung; Alexey V. Ustinov; Steven M. Anlage

2014-03-25T23:59:59.000Z

16

Resonant dielectric metamaterials  

SciTech Connect (OSTI)

A resonant dielectric metamaterial comprises a first and a second set of dielectric scattering particles (e.g., spheres) having different permittivities arranged in a cubic array. The array can be an ordered or randomized array of particles. The resonant dielectric metamaterials are low-loss 3D isotropic materials with negative permittivity and permeability. Such isotropic double negative materials offer polarization and direction independent electromagnetic wave propagation.

Loui, Hung; Carroll, James; Clem, Paul G; Sinclair, Michael B

2014-12-02T23:59:59.000Z

17

Terahertz Quantum-Cascade Transmission-Line Metamaterials  

E-Print Network [OSTI]

Terahertz Transmission-Line Metamaterials . . . . . . .CRLH Transmission Lines . . . . . . . . . . . . . . . .Terahertz CRLH Transmission-Line Metamaterials . . . . . . .

Tavallaee, Amir Ali

2012-01-01T23:59:59.000Z

18

Active terahertz metamaterial devices  

SciTech Connect (OSTI)

Metamaterial structures are taught which provide for the modulation of terahertz frequency signals. Each element within an array of metamaterial (MM) elements comprises multiple loops and at least one gap. The MM elements may comprise resonators with conductive loops and insulated gaps, or the inverse in which insulated loops are present with conductive gaps; each providing useful transmissive control properties. The metamaterial elements are fabricated on a semiconducting substrate configured with a means of enhancing or depleting electrons from near the gaps of the MM elements. An on to off transmissivity ratio of about 0.5 is achieved with this approach. Embodiments are described in which the MM elements incorporated within a Quantum Cascade Laser (QCL) to provide surface emitting (SE) properties.

Chen, Houtong (Los Alamos, NM); Padilla, Willie John (Newton, MA); Averitt, Richard Douglas (Newton, MA); O'Hara, John F. (Los Alamos, NM); Lee, Mark (Albuquerque, NM)

2010-11-02T23:59:59.000Z

19

TRANSPARENCY RECYCLING PROGRAM PROCEDURES  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

used overhead transparencies RECYCLE them for REUSE. It's Easy Follow these simple procedures: 1.) COLLECT used transparencies to be recycled. 2.) SEPARATE the transparencies...

20

Metamaterial microwave holographic imaging system  

Science Journals Connector (OSTI)

We demonstrate a microwave imaging system that combines advances in metamaterial aperture design with emerging computational imaging techniques. The flexibility inherent to...

Hunt, John; Gollub, Jonah; Driscoll, Tom; Lipworth, Guy; Mrozack, Alex; Reynolds, Matthew S; Brady, David J; Smith, David R

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Light propagation and Imaging in Indefinite Metamaterials  

E-Print Network [OSTI]

Magnetic Response from Artificial Materials,” Science, vol.Magnetic Response of Metamaterials at 100 Terahertz,” Science,

Yao, Jie

2010-01-01T23:59:59.000Z

22

Doped graphene nanohole arrays for flexible transparent conductors  

E-Print Network [OSTI]

Graphene nanohole arrays (GNAs) were fabricated using nanoimprint lithography. The improved optical transmittance of GNAs is primarily due to the reduced surface coverage of graphene from the nanohole fabrication. Importantly, the exposed edges...

Liu, Jianwei; Xu, Guowei; Rochford, Caitlin; Lu, Rongtao; Wu, Judy; Edwards, Christina M.; Berrie, Cindy L.; Chen, Zhijun; Maroni, Victor A.

2011-07-15T23:59:59.000Z

23

Floating insulated conductors for heating subsurface formations  

DOE Patents [OSTI]

A heating system for a subsurface formation includes a conduit located in a first opening in the subsurface formation. Three electrical conductors are located in the conduit. A return conductor is located inside the conduit. The return conductor is electrically coupled to the ends of the electrical conductors distal from the surface of the formation. Insulation is located inside the conduit. The insulation electrically insulates the three electrical conductors, the return conductor, and the conduit from each other.

Burns, David; Goodwin, Charles R.

2014-07-29T23:59:59.000Z

24

TRANSPARENCY RECYCLING PROGRAM PROCEDURES  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

TRANSPARENCY RECYCLING Don't throw out your used overhead transparencies! RECYCLE them for REUSE. It's Easy! Follow these simple procedures: 1.) COLLECT used transparencies to be recycled. 2.) SEPARATE the transparencies from ringed binders, plastic or paper folders, envelopes, and/or files. 3.) PLACE the transparencies (only) into an intra-laboratory mail envelope. 4.) SEND the envelope to: Terri Schneider, Building 201, 1D-10. Terri will prepare a

25

Sputtered pin amorphous silicon semi-conductor device and method therefor  

DOE Patents [OSTI]

A high efficiency amorphous silicon PIN semi-conductor device is constructed by the sequential sputtering of N, I and P layers of amorphous silicon and at least one semi-transparent ohmic electrode. A method of construction produces a PIN device, exhibiting enhanced physical integrity and facilitates ease of construction in a singular vacuum system and vacuum pump down procedure.

Moustakas, Theodore D. (Berkeley Heights, NJ); Friedman, Robert A. (Milford, NJ)

1983-11-22T23:59:59.000Z

26

Electromagnetic induction in accelerated conductors  

Science Journals Connector (OSTI)

Boundary conditions are derived for the interfaces of a conductor moving across an external magnetic field in an ambient medium (vacuum or nonconductor), which consider the emission of electromagnetic waves from the conductor surface as a result of electromagnetic induction. These boundary conditions are applied to the initial-boundary-value problem for the electromagnetic induction in a conducting slab, which is accelerated across a homogeneous magnetic field to a nonrelativistic velocity. Fourier-series solutions are presented for the transient electromagnetic fields in the moving conductor and the discontinuous electromagnetic waves in the ambient space. It is shown that the transient electromagnetic fields inside and outside the conductor are due to two mechanisms, i.e., "velocity induction" (ordinary induction) and "acceleration induction" [dv?(t)dt?0?]. The latter result cannot be explained by means of the Lorentz transformation, which is valid only for constant conductor velocities (inertial frames).

H. E. Wilhelm

1982-06-01T23:59:59.000Z

27

Conductor for a fluid-cooled winding  

DOE Patents [OSTI]

A conductor and method of making the conductor are provided for use in winding electrical coils which are cooled by a fluid communicating with the conductor. The conductor is cold worked through twisting and reshaping steps to form a generally rectangular cross section conductor having a plurality of helical cooling grooves extending axially of the conductor. The conductor configuration makes it suitable for a wide variety of winding applications and permits the use of simple strip insulation between turns and perforated sheet insulation between layers of the winding.

Kenney, Walter J. (Clinton, TN)

1983-01-01T23:59:59.000Z

28

Metamaterials for terahertz polarimetric devices  

SciTech Connect (OSTI)

We present experimental and numerical investigations of planar terahertz metamaterial structures designed to interact with the state of polarization. The dependence of metamaterial resonances on polarization results in unique amplitude and phase characteristics of the terahertz transmission, providing the basis for polarimetric terahertz devices. We highlight some potential applications for polarimetric devices and present simulations of a terahertz quarter-wave plate and a polarizing terahertz beam splitter. Although this work was performed at terahertz frequencies, it may find applications in other frequency ranges as well.

O'hara, John F [Los Alamos National Laboratory; Taylor, Antoinette J [Los Alamos National Laboratory; Smirnova, Evgenya [Los Alamos National Laboratory; Azad, Abul [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

29

Cation Defects and Conductivity in Transparent Oxides  

SciTech Connect (OSTI)

High quality doped zinc oxide and mixed transition metal spinel oxide films have been deposited by means of sputter deposition from metal and metal oxide targets, and by spin casting from aqueous or alcoholic precursor solutions. Deposition conditions and post-deposition processing are found to alter cation oxidation states and their distributions in both oxide materials resulting in marked changes to both optical transmission and electrical response. For ZnO, partial reduction of the neat or doped material by hydrogen treatment of the heated film or by electrochemical processing renders the oxide n-type conducting. Continued reduction was found to diminish conductivity. In contrast, oxidation of the infrared transparent p-type spinel conductors typified by NiCo2O4 was found to increase conductivity. The disparate behavior of these two materials is caused in part by the sign of the charge carrier and by the existence of two different charge transport mechanisms that are identified as free carrier conduction and polaron hopping. While much work has been reported concerning structure/property relationships in the free carrier conducting oxides, there is a significantly smaller body of information on transparent polaron conductors. In this paper, we identify key parameters that promote conductivity in mixed metal spinel oxides and compare their behavior with that of the free carrier TCO’s.

Exarhos, Gregory J.; Windisch, Charles F.; Ferris, Kim F.; Owings, Robert R.

2007-10-24T23:59:59.000Z

30

Casimir interactions between graphene sheets and metamaterials  

SciTech Connect (OSTI)

The Casimir force between graphene sheets and metamaterials is studied. Theoretical results based on the Lifshitz theory for layered, planar, two-dimensional systems in media are presented. We consider graphene-graphene, graphene-metamaterial, and metal-graphene-metamaterial configurations. We find that quantum effects of the temperature-dependent force are not apparent until the submicron range. In contrast to results with bulk dielectric and bulk metallic materials, no Casimir repulsion is found when graphene is placed on top of a magnetically active metamaterial substrate, regardless of the strength of the low-frequency magnetic response. In the case of the metal-graphene-metamaterial setting, repulsion between the metamaterial and the metal-graphene system is possible only when the dielectric response from the metal contributes significantly.

Drosdoff, D.; Woods, Lilia M. [Department of Physics, University of South Florida, Tampa, Florida 33620 (United States)

2011-12-15T23:59:59.000Z

31

Reversed Doppler effect in double negative metamaterials  

Science Journals Connector (OSTI)

Doppler shifts in double negative metamaterials have never been observed. This Rapid Communication presents experimental results on Doppler effect in a double negative acoustic metamaterial. We observed that frequency was downshifted when the source was approaching and upshifted when receding. Notably, while in ordinary media wavelengths corresponding to downshifted frequencies are longer, we demonstrate that in double negative metamaterials wavelengths increase as the frequencies increase. Consequently even though the frequencies were downshifted in front of the moving source, the wavelengths became shorter.

Sam Hyeon Lee; Choon Mahn Park; Yong Mun Seo; Chul Koo Kim

2010-06-14T23:59:59.000Z

32

Achieving laser ignition using zero index metamaterials  

Science Journals Connector (OSTI)

The possibility of laser ignition using zero index metamaterials (ZIM) is investigated theoretically. Using this method, multiple laser beams can be focused automatically regardless of...

Zhai, Tianrui; Shi, Jinwei; Chen, Shujing; Liu, Dahe; Zhang, Xinping

2011-01-01T23:59:59.000Z

33

Electron beam coupling to a metamaterial structure  

SciTech Connect (OSTI)

Microwave metamaterials have shown promise in numerous applications, ranging from strip lines and antennas to metamaterial-based electron beam driven devices. In general, metamaterials allow microwave designers to obtain electromagnetic characteristics not typically available in nature. High Power Microwave (HPM) sources have in the past drawn inspiration from work done in the conventional microwave source community. In this article, the use of metamaterials in an HPM application is considered by using an effective medium model to determine the coupling of an electron beam to a metamaterial structure in a geometry similar to that of a dielectric Cerenkov maser. Use of the effective medium model allows for the analysis of a wide range of parameter space, including the “mu-negative,”“epsilon-negative,” and “double negative” regimes of the metamaterial. The physics of such a system are modeled analytically and by utilizing the particle-in-cell code ICEPIC. For this geometry and effective medium representation, optimum coupling of the electron beam to the metamaterial, and thus the optimum microwave or RF production, occurs in the epsilon negative regime of the metamaterial. Given that HPM tubes have been proposed that utilize a metamaterial, this model provides a rapid method of characterizing a source geometry that can be used to quickly understand the basic physics of such an HPM device.

French, David M.; Shiffler, Don [Directed Energy Directorate, Air Force Research Laboratory, Albuquerque, New Mexico 87117 (United States)] [Directed Energy Directorate, Air Force Research Laboratory, Albuquerque, New Mexico 87117 (United States); Cartwright, Keith [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)] [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

2013-08-15T23:59:59.000Z

34

Quartz antenna with hollow conductor  

DOE Patents [OSTI]

A radio frequency (RF) antenna for plasma ion sources is formed of a hollow metal conductor tube disposed within a glass tube. The hollow metal tubular conductor has an internal flow channel so that there will be no coolant leakage if the outer glass tube of the antenna breaks. A portion of the RF antenna is formed into a coil; the antenna is used for inductively coupling RF power to a plasma in an ion source chamber. The antenna is made by first inserting the metal tube inside the glass tube, and then forming the glass/metal composite tube into the desired coil shape.

Leung, Ka-Ngo (Hercules, CA); Benabou, Elie (Alameda, CA)

2002-01-01T23:59:59.000Z

35

Flexible and Transparent Memory  

E-Print Network [OSTI]

K. L. Wang. , “Robust Bi-Stable Memory Operation in Single-Graphene Ferroelectric Memory,” Appl. Phy. Lett. , 99 (4),Flexible and Transparent Memory” IEEE International Memory

KIM, SUNG MIN

2012-01-01T23:59:59.000Z

36

Carbon Nanotubes in a Photonic Metamaterial  

Science Journals Connector (OSTI)

Hybridization of single-walled carbon nanotubes with plasmonic metamaterials leads to photonic media with an exceptionally strong ultrafast nonlinearity. This behavior is underpinned by strong coupling of the nanotube excitonic response to the weakly radiating Fano-type resonant plasmonic modes that can be tailored by metamaterial design.

Andrey E. Nikolaenko; Francesco De Angelis; Stuart A. Boden; Nikitas Papasimakis; Peter Ashburn; Enzo Di Fabrizio; Nikolay I. Zheludev

2010-04-12T23:59:59.000Z

37

Graphene plasmonics for tunable terahertz metamaterials  

E-Print Network [OSTI]

Graphene plasmonics for tunable terahertz metamaterials Long Ju1 , Baisong Geng1,6 , Jason Horng1 metamaterials1­3 . Plasmons of two-dimensional massless electrons, as present in graphene, show unusual graphene micro- ribbonarrays.Wedemonstratethatgrapheneplasmonresonances can be tuned over a broad terahertz

Wang, Feng

38

Temperature limited heater utilizing non-ferromagnetic conductor  

DOE Patents [OSTI]

A heater is described. The heater includes a ferromagnetic conductor and an electrical conductor electrically coupled to the ferromagnetic conductor. The ferromagnetic conductor is positioned relative to the electrical conductor such that an electromagnetic field produced by time-varying current flow in the ferromagnetic conductor confines a majority of the flow of the electrical current to the electrical conductor at temperatures below or near a selected temperature.

Vinegar; Harold J. (Bellaire, TX), Harris; Christopher Kelvin (Houston, TX)

2012-07-17T23:59:59.000Z

39

A Dictionary for Transparency  

SciTech Connect (OSTI)

There are many terms that are used in association with the U.S. Defense Threat Reduction Agency (DTRA) Transparency Project associated with the Mayak Fissile Materials Storage Facility. This is a collection of proposed definitions of these terms.

Kouzes, Richard T.

2001-11-15T23:59:59.000Z

40

Onset voltage of corona on coated conductors  

SciTech Connect (OSTI)

This paper is aimed for investigating the effect of surface coating on the positive and negative onset voltages of corona from stressed conductor as a pre-requisite for onset-voltage calculation. The electric field is accurately calculated by the charge simulation technique. The calculated onset voltages agreed satisfactorily with those measured experimentally for bare conductors. The effect of coating-layer thickness and permittivity as well as conductor radius and height on the onset-voltage values is discussed.

Abdel-Salam, M. [Assiut Univ. (Egypt). Electrical Engineering Dept.; Abo-Shal, Y. [SCECO-East, Dammam (Saudi Arabia). Electrical Engineering Div.

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Tailoring photonic metamaterial resonances for thermal radiation  

E-Print Network [OSTI]

Selective solar absorbers generally have limited effectiveness in unconcentrated sunlight, because of reradiation losses over a broad range of wavelengths and angles. However, metamaterials offer the potential to limit ...

Bermel, Peter A.

42

Metamaterial-Enhanced Nonlinear Terahertz Spectroscopy  

E-Print Network [OSTI]

We demonstrate large nonlinear terahertz responses in the gaps of metamaterial split ring resonators in several materials and use nonlinear THz transmission and THz-pump/THz-probe spectroscopy to study the nonlinear responses ...

Hwang, Harold Young

43

Interferometric direction finding with a metamaterial detector  

SciTech Connect (OSTI)

We present measurements and analysis demonstrating useful direction finding of sources in the S band (2–4?GHz) using a metamaterial detector. An augmented metamaterial absorber that supports magnitude and phase measurement of the incident electric field, within each unit cell, is described. The metamaterial is implemented in a commercial printed circuit board process with off-board back-end electronics. We also discuss on-board back-end implementation strategies. Direction finding performance is analyzed for the fabricated metamaterial detector using simulated data and the standard algorithm, MUtiple SIgnal Classification. The performance of this complete system is characterized by its angular resolution as a function of radiation density at the detector. Sources with power outputs typical of mobile communication devices can be resolved at kilometer distances with sub-degree resolution and high frame rates.

Venkatesh, Suresh; Schurig, David, E-mail: david.schurig@utah.edu [Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)] [Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States); Shrekenhamer, David; Padilla, Willie [Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States)] [Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States); Xu, Wangren; Sonkusale, Sameer [Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155 (United States)] [Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155 (United States)

2013-12-16T23:59:59.000Z

44

Elastic metamaterials with local resonances: an overview  

Science Journals Connector (OSTI)

Metamaterials are artificial composite materials engineered to have properties that may not be found in nature. By exploring locally resonant effect of the building units elasticmetamaterials are able to possess negative values of effective mass effective bulk or shear modulus. Mass-spring and continuum material versions of these elasticmetamaterials are reported and the physical mechanisms of negative effective parameters are demonstrated. Applications of metamaterials to acoustic cloaking and superlensing are also discussed.

Xiaoming Zhou; Xiaoning Liu; Gengkai Hu

2012-01-01T23:59:59.000Z

45

Active negative-index metamaterial powered by an electron beam  

E-Print Network [OSTI]

An active negative index metamaterial that derives its gain from an electron beam is introduced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a periodic array of holes shaped as ...

Shapiro, Michael

46

E-Print Network 3.0 - anisotropic magnetodielectric metamaterials...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

rotation in microwave chiral metamaterials can Source: Zheludev, Nikolay - Optoelectronics Research Centre & School of Physics and Astronomy, University of Southampton...

47

Muon Studies in Organic Conductors [and Discussion  

Science Journals Connector (OSTI)

15 February 1995 research-article Muon Studies in Organic Conductors [and Discussion...Stoneham This paper contains a brief review of muon studies of organic conductors with emphasis...polymers. The species created by implanted muons in both semiconducting polymers and polymers...

1995-01-01T23:59:59.000Z

48

Scientists produce transparent, light-harvesting material  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transparent, light-harvesting material Scientists produce transparent, light-harvesting material The material could be used in development of transparent solar panels. November 3,...

49

Novel transparent electrodes allow sustainable production of electronic devices  

SciTech Connect (OSTI)

A novel technique for fabricating inexpensive, transparent electrodes from common metals has been developed by engineers and scientists at Iowa State University and Ames Laboratory. They exhibit very high transparency and are very good electrical conductors. This is a combination of properties that is difficult to achieve with common materials. The most frequently used transparent electrode in today's high-technology devices (such as LCD screens) is indium tin oxide (ITO). While ITO performs well in these applications, the supply of indium is very limited. In addition, it is rapidly decreasing as consumer demand for flat-panel electronics is skyrocketing. According to a 2004 US Geological Survey report, as little as 14 years exploitation of known indium reserves remains. In addition to increasing prices, the dwindling supply of indium suggests its use is not sustainable for future generations of electronics enthusiasts. Solar cells represent another application where transparent electrodes are used. To make solar-energy collection economically feasible, all parts of solar photovoltaics must be made more efficient and cost-effective. Our novel transparent electrodes have the potential to do both. In addition, there is much interest in developing more efficient, cost-effective, and environmentally friendly lighting. Incandescent light bulbs are very inefficient, because most of their energy consumption is wasted as heat. Fluorescent lighting is much more efficient but still uses mercury, an environmental toxin. An attractive alternative is offered by LEDs, which have very high efficiencies and long lifetimes, and do not contain mercury. If made bright enough, LED use for general lighting could provide a viable alternative. We have fabricated electrodes from more commonly available materials, using a technique that is cost effective and environmentally friendly. Most of today's electronic devices are made in specialized facilities equipped with low-particle-count clean-room facilities and multimillion-dollar equipment. On the other hand, the novel process we developed uses a method that makes use of polymer molds and standard deposition techniques in an ambient laboratory environment. The final structure consists of tall ribbons of metal (standing on edge) that are so thin that they do not block light but are very good conductors. The advantage of this design is that it avoids the competition between conductivity and transparency inherent in transparent oxide electrodes. By making the structure taller, conductivity can be increased without impacting transparency. We have measured both electrical conductivity and transparency for these structures. We performed two-wire electrical measurements to quantify the structures resistance using metal contacts deposited on each end. The total sample area was 4 x 4mm{sup 2}. We measured a resistance of structures with 40nm gold sidewalls of 7.3{Omega}, which is lower than that of ITO glass (which has a sheet resistance around 10O/square). We investigated the structures optical properties based on both specular- and total-transmission measurements. Specular transmission is measured by collecting the transmitted light at normal incidence, while total transmission is obtained by collecting transmitted light at normal incidence and diffracted light using an integrating sphere. Figure 3 shows the total transmission of a grating with 40nm gold or silver sidewalls on a glass substrate compared to that of ITO. Additionally, the transparency changes very little within 30{sup o} off normal incidence. This high visible-light transmission of our metal-patterned structures is very promising for their application as transparent electrodes, because most visible light was allowed to propagate through the patterned metallic/polymeric structures. Researchers in our group continue to refine the fabrication methods and are investigating methods to make large-scale structures for use in a variety of applications that require both transparency and high electrical conductivity. We are also applying these fab

Constant, Kristen

2010-12-27T23:59:59.000Z

50

Interaction between graphene and metamaterials: split rings vs. wire pairs  

SciTech Connect (OSTI)

We have recently shown that graphene is unsuitable to replace metals in the current-carrying elements of metamaterials. At the other hand, experiments have demonstrated that a layer of graphene can modify the optical response of a metal-based metamaterial. Here we study this electromagnetic interaction between metamaterials and graphene. We show that the weak optical response of graphene can be modified dramatically by coupling to the strong resonant fields in metallic structures. A crucial element determining the interaction strength is the orientation of the resonant fields. If the resonant electric field is predominantly parallel to the graphene sheet (e.g., in a complementary split-ring metamaterial), the metamaterial’s resonance can be strongly damped. If the resonant field is predominantly perpendicular to the graphene sheet (e.g., in a wire-pair metamaterial), no significant interaction exists.

Zou, Yanhong; Tassin, Philippe; Koschny, Thomas; Soukoulis, Costas

2012-05-14T23:59:59.000Z

51

Electrode with transparent series resistance for uniform switching of optical modulation devices  

DOE Patents [OSTI]

Switching uniformity of an optical modulation device for controlling the propagation of electromagnetic radiation is improved by use of an electrode comprising an electrically resistive layer that is transparent to the radiation. The resistive layer is preferably an innerlayer of a wide-bandgap oxide sandwiched between layers of indium tin oxide or another transparent conductor, and may be of uniform thickness, or may be graded so as to provide further improvement in the switching uniformity. The electrode may be used with electrochromic and reversible electrochemical mirror (REM) smart window devices, as well as display devices based on various technologies.

Tench, D. Morgan (Camarillo, CA); Cunningham, Michael A. (Thousand Oaks, CA); Kobrin, Paul H. (Newbury Park, CA)

2008-01-08T23:59:59.000Z

52

Metamaterial model of a time crystal  

E-Print Network [OSTI]

Propagation of monochromatic extraordinary light in a hyperbolic metamaterial is identical to propagation of massive particles in a three dimensional effective Minkowski spacetime, in which the role of a timelike variable is played by one of the spatial coordinates. We demonstrate that this analogy may be used to build a metamaterial model of a time crystal, which has been recently suggested by Wilczek and Shapere. It is interesting to note that the effective single-particle energy spectrum in such a model does not contain a static ground state, thus providing a loophole in the proof of time crystal non-existence by P. Bruno.

Smolyaninov, Igor I

2015-01-01T23:59:59.000Z

53

Birck Nanotechnology Center Transforming Light with Metamaterials  

E-Print Network [OSTI]

Birck Nanotechnology Center Transforming Light with Metamaterials (with A.V. Kildishev, W. Cai, V.P. Drachev, S. Xiao, U. Chettiar) OUTLINE Birck Nanotechnology Center Vladimir M. Shalaev Purdue University;Birck Nanotechnology Center Meta-Magnetics: from 10GHz to 200THz Terahertz magnetism a) Yen, et al. ~ 1

Fiebig, Peter

54

Flux Exclusion Superconducting Quantum Metamaterial: Towards  

E-Print Network [OSTI]

. Recently, arrays of Josephson junction devices have been proposed as a possible solution. However-atoms containing Josephson junctions15­19 , experiments have been conducted on single superconducting qubit meta-atoms20,21 and one- dimensional Josephson junction metamaterials22 . The recently discovered class of iron

Zheludev, Nikolay

55

Powerline Conductor Operational Testing Facility (PCOT) The Powerline Conductor Operational Testing Facility (PCOT), currently planned for  

E-Print Network [OSTI]

advanced overhead power line conductors and superconducting cables into an operational high-voltage (HV) transmission system for long-term testing and evaluation. The HV transmission test network within PCOT, Tennessee, 500-kV Substation. In addition to testing advanced conductors and cables, PCOT provides

56

Audio Conductor The Audio Conductor project aims to give users control  

E-Print Network [OSTI]

Audio Conductor The Audio Conductor project aims to give users control of prerecorded music in real and gyroscope data back to a central unit. The central unit consists of an FPGA, which manages the audio and song selection can be recognized. The tempo of the output audio is then modified to match the user

Hero, Alfred O.

57

Reducing the losses of optical metamaterials  

SciTech Connect (OSTI)

The field of metamaterials is driven by fascinating and far-reaching theoretical visions, such as perfect lenses, invisibility cloaking, and enhanced optical nonlinearities. However, losses have become the major obstacle towards real world applications in the optical regime. Reducing the losses of optical metamaterials becomes necessary and extremely important. In this thesis, two approaches are taken to reduce the losses. One is to construct an indefinite medium. Indefinite media are materials where not all the principal components of the permittivity and permeability tensors have the same sign. They do not need the resonances to achieve negative permittivity, {var_epsilon}. So, the losses can be comparatively small. To obtain indefinite media, three-dimensional (3D) optical metallic nanowire media with different structures are designed. They are numerically demonstrated that they are homogeneous effective indefinite anisotropic media by showing that their dispersion relations are hyperbolic. Negative group refraction and pseudo focusing are observed. Another approach is to incorporate gain into metamaterial nanostructures. The nonlinearity of gain is included by a generic four-level atomic model. A computational scheme is presented, which allows for a self-consistent treatment of a dispersive metallic photonic metamaterial coupled to a gain material incorporated into the nanostructure using the finite-difference time-domain (FDTD) method. The loss compensations with gain are done for various structures, from 2D simplified models to 3D realistic structures. Results show the losses of optical metamaterials can be effectively compensated by gain. The effective gain coefficient of the combined system can be much larger than the bulk gain counterpart, due to the strong local-field enhancement.

Fang, Anan

2010-12-15T23:59:59.000Z

58

Terahertz chiral metamaterials with giant and dynamically tunable optical activity  

SciTech Connect (OSTI)

We demonstrated giant optical activity using a chiral metamaterial composed of an array of conjugated bilayer metal structures. The chiral metamaterials were further integrated with photoactive inclusions to accomplish a wide tuning range of the optical activity through illumination with near-infrared light. The strong chirality observed in our metamaterials results in a negative refractive index, which can also be well controlled by the near-infrared optical excitation.

Zhou, Jiangfeng; Chowdhury, Dibakar Roy; Zhao, Rongkuo; Azad, Abul K.; Chen, Hou-Tong; Soukoulis, Costas M.; Taylor, Antoinette J.; O'Hara, John F.

2012-07-27T23:59:59.000Z

59

Graphene metamaterials based tunable terahertz absorber: effective surface conductivity approach  

Science Journals Connector (OSTI)

In this paper we present the efficient design of functional thin-film metamaterial devices with the effective surface conductivity approach. As an example, we demonstrate a graphene...

Andryieuski, Andrei; Lavrinenko, Andrei V

2013-01-01T23:59:59.000Z

60

Electron-beam-driven nanoscale metamaterial light sources  

Science Journals Connector (OSTI)

We show experimentally that beams of free electrons can induce light emission from nanoscale planar photonic metamaterials. Wavelengths of emitted light are determined by both the...

Adamo, Giorgio; Ou, Jun-Yu; MacDonald, Kevin; De Angelis, Francesco; Di Fabrizio, Enzo; Zheludev, Nikolay

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Methods | Transparent Cost Database  

Open Energy Info (EERE)

Methods Methods Disclaimer The data gathered here are for informational purposes only. Inclusion of a report in the database does not represent approval of the estimates by DOE or NREL. Levelized cost calculations DO NOT represent real world market conditions. The calculation uses a single discount rate in order to compare technology costs only. About the Cost Database For emerging energy technologies, a variety of cost and performance numbers are cited in presentations and reports for present-day characteristics and potential improvements. Amid a variety of sources and methods for these data, the Office of Energy Efficiency and Renewable Energy's technology development programs determine estimates for use in program planning. The Transparent Cost Database collects program cost and performance

62

Thermal conductor for high-energy electrochemical cells  

DOE Patents [OSTI]

A thermal conductor for use with an electrochemical energy storage device is disclosed. The thermal conductor is attached to one or both of the anode and cathode contacts of an electrochemical cell. A resilient portion of the conductor varies in height or position to maintain contact between the conductor and an adjacent wall structure of a containment vessel in response to relative movement between the conductor and the wall structure. The thermal conductor conducts current into and out of the electrochemical cell and conducts thermal energy between the electrochemical cell and thermally conductive and electrically resistive material disposed between the conductor and the wall structure. The thermal conductor may be fabricated to include a resilient portion having one of a substantially C-shaped, double C-shaped, Z-shaped, V-shaped, O-shaped, S-shaped, or finger-shaped cross-section. An elastomeric spring element may be configured so as to be captured by the resilient conductor for purposes of enhancing the functionality of the thermal conductor. The spring element may include a protrusion that provides electrical insulation between the spring conductor and a spring conductor of an adjacently disposed electrochemical cell in the presence of relative movement between the cells and the wall structure. The thermal conductor may also be fabricated from a sheet of electrically conductive material and affixed to the contacts of a number of electrochemical cells.

Hoffman, Joseph A. (Minneapolis, MN); Domroese, Michael K. (South St. Paul, MN); Lindeman, David D. (Hudson, WI); Radewald, Vern E. (Austin, TX); Rouillard, Roger (Beloeil, CA); Trice, Jennifer L. (Eagan, MN)

2000-01-01T23:59:59.000Z

63

METAMATERIALS: Large-area printed 3D negative-index metamaterial is flexible -Laser Focus World http://www.laserfocusworld.com/articles/print/volume-47/issue-8/world-news/metamaterials-large-area-printed-3d-negative-index-metamaterial-is-flexible.html[8/1  

E-Print Network [OSTI]

METAMATERIALS: Large-area printed 3D negative-index metamaterial is flexible - Laser Focus World-area printed 3D negative-index metamaterial is flexible METAMATERIALS: Large-area printed 3D negative, with the advent of a printing process that produces large-area 3D multilayer optical NIMs --8.7 Ã? 8.7 cm square

Rogers, John A.

64

Stators with improved conductor assembly and method of making same  

DOE Patents [OSTI]

A stator includes a stator core, a plurality of slots, and a conductor. The plurality of slots are formed within the stator core. The conductor is disposed continuously within at least two of the plurality of openings.

Dang, Dang Dinh; Blissenbach, Rolf; Schauer, David; Wattleworth, John; Milani, Michael; Hatch, Erik

2013-07-30T23:59:59.000Z

65

Resistive coating for current conductors in cryogenic applications  

DOE Patents [OSTI]

This invention relates to a resistive or semiconducting coating for use on current conductors in cryogenic applications. This includes copper-clad superconductor wire, copper wire used for stabilizing superconductor magnets, and for hyperconductors. The coating is a film of cuprous sulfide (Cu.sub.2 S) that has been found not to degrade the properties of the conductors. It is very adherent to the respective conductors and satisfies the mechanical, thermal and electrical requirements of coatings for the conductors.

Hirayama, Chikara (Murrysville, PA); Wagner, George R. (Murrysville, PA)

1982-05-18T23:59:59.000Z

66

Fast dynamic force computation for electrostatic and electromagnetic conductors  

E-Print Network [OSTI]

interval. Hence ef- ficient and accurate simulation tools are required for calculation of electrostatic and electromagnetic forces. A. Electrostatic Conductors When a voltage is applied between two conductors, electrostatic charges are induced... Conductors Electromagnetic interactions gain importance in high performance and high power applications because the magnitude of electrostatic forces is limited by the applied voltage. A current carrying conductor produces a magnetic field around the con...

Koteeswaran, Prabhavathi

2005-02-17T23:59:59.000Z

67

Adv. Sci. Technol. (Faenza, Italy) 33, 1037-1050 (2003) TECHNOLOGICAL CHALLENGES FOR TRANSPARENT CONDUCTORS  

E-Print Network [OSTI]

in part by the US National Renewable Energy Laboratory. #12;2 2. OPTICAL AND ELECTRONIC PROPERTIES 2 of etching; and factors affecting their usage: chemical durability, surface roughness, hardness, mechanical in modern technology, such as energy efficient windows, displays, anti-static coatings.1

68

Prevention of covered conductor burndown on distribution circuits  

SciTech Connect (OSTI)

When an overhead conductor in a multigrounded neutral distribution system breaks and falls to the ground without simultaneously contacting the multigrounded neutral conductor, there is a significant probability of it coming to rest on a high-impedance surface, such as concrete or asphalt. The motivation to prevent burndown of overhead distribution conductors is discussed. 5 refs.

Lee, R.E.; Fritz, D.E.; Stiller, P.H.; Kilar, L.A.; Shankle, D.F.

1980-01-01T23:59:59.000Z

69

Differential GPS Measurement of Overhead Conductor Sag: Software Implementation  

E-Print Network [OSTI]

that can measure the sag of overhead transmission conductors for 69 kV circuits and above. The instrument rating of a transmission-line conductor. The software can be used in an on-line energy manage- ment line near the conductors that effectively measures the electric field. A typical GUI screen is shown

70

Fabrication of cubic micron-scale 3D metamaterial resonators.  

SciTech Connect (OSTI)

We present a new fabrication technique called Membrane Projection Lithography for the production of three-dimensional metamaterials at infrared wavelengths. Using this technique, multilayer infrared metamaterials that include both in-plane and out-of-plane resonators can be fabricated.

Sinclair, Michael B.; Brener, Igal; Wendt, Joel Robert; Burckel, David Bruce; Ten Eyck, Gregory A.

2010-06-01T23:59:59.000Z

71

Metamaterials for threat reduction applications: imaging, signal processing, and cloaking  

E-Print Network [OSTI]

Metamaterials for threat reduction applications: imaging, signal processing, and cloaking R. D effort is underway to fill this "THz gap" in view of potential threat reduction applications) and Theoretical Divisions, are exploring metamaterials-based de- vices operating at THz frequencies for threat

72

Thermal Agitation of Electricity in Conductors  

Science Journals Connector (OSTI)

Statistical fluctuation of electric charge exists in all conductors, producing random variation of potential between the ends of the conductor. The effect of these fluctuations has been measured by a vacuum tube amplifier and thermocouple, and can be expressed by the formula I¯2=(2kT?)?0?R(?)|Y(?)|2d?. I is the observed current in the thermocouple, k is Boltzmann's gas constant, T is the absolute temperature of the conductor, R(?) is the real component of impedance of the conductor, Y(?) is the transfer impedance of the amplifier, and ?2?=f represents frequency. The value of Boltzmann's constant obtained from the measurements lie near the accepted value of this constant. The technical aspects of the disturbance are discussed. In an amplifier having a range of 5000 cycles and the input resistance R the power equivalent of the effect is V¯2R=0.8×10-16 watt, with corresponding power for other ranges of frequency. The least contribution of tube noise is equivalent to that of a resistance Rc=1.5×105ip?, where ip is the space current in milliamperes and ? is the effective amplification of the tube.

J. B. Johnson

1928-07-01T23:59:59.000Z

73

CIS 677 LAB IV: Transparent Bridge To understand the transparent bridge concept.  

E-Print Network [OSTI]

CIS 677 LAB IV: Transparent Bridge 1 Goals To understand the transparent bridge concept. To implement a simpli ed transparent bridge algorithm. 2 Features of Transparent Bridges The three features of transparent bridges are: 1. The promiscuous listen and the store and forwarding capabilities. 2. Learning

Jain, Raj

74

Tunable metamaterials based on voltage controlled strong coupling  

SciTech Connect (OSTI)

We present the design, fabrication, and realization of an electrically tunable metamaterial operating in the mid-infrared spectral range. Our devices combine intersubband transitions in semiconductor quantum-wells with planar metamaterials and operate in the strong light-matter coupling regime. The resonance frequency of the intersubband transition can be controlled by an external bias relative to the fixed metamaterial resonance. This allows us to switch dynamically from an uncoupled to a strongly coupled system and thereby to shift the eigenfrequency of the upper polariton branch by 2.5 THz (corresponding to 8% of the center frequency or one full linewidth) with a bias of 5?V.

Benz, Alexander, E-mail: anbenz@sandia.gov; Brener, Igal [Center for Integrated Nanotechnologies (CINT), Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States) [Center for Integrated Nanotechnologies (CINT), Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States); Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States); Montaño, Inès; Klem, John F. [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)] [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)

2013-12-23T23:59:59.000Z

75

Advanced Jones calculus for the classification of periodic metamaterials  

Science Journals Connector (OSTI)

By relying on an advanced Jones calculus, we analyze the polarization properties of light upon propagation through metamaterial slabs in a comprehensive manner. Based on symmetry considerations, we show that all periodic metamaterials may be divided into five different classes only. It is shown that each class differently affects the polarization of the transmitted light and sustains different eigenmodes. We show how to deduce these five classes from symmetry considerations and provide a simple algorithm that can be applied to decide to which class a given metamaterial belongs by measuring only the transmitted intensities.

Christoph Menzel; Carsten Rockstuhl; Falk Lederer

2010-11-15T23:59:59.000Z

76

Microstructure effects for Casimir forces in chiral metamaterials  

E-Print Network [OSTI]

We examine a recent prediction for the chirality dependence of the Casimir force in chiral metamaterials by numerical computation of the forces between the exact microstructures, rather than homogeneous approximations. ...

Johnson, Steven G.

77

Two dimensional control of metamaterial parameters for radiation directivity  

E-Print Network [OSTI]

This work examines the feasibility of using metamaterials to direct radiation. The limits of required index of refraction and the required material depth are explored using MATLAB simulations. A wedge of connected S-shape ...

Foltz, Eleanor R. (Eleanor Ruth)

2006-01-01T23:59:59.000Z

78

Measurement and device design of left-handed metamaterials  

E-Print Network [OSTI]

The properties of a variety of left-handed metamaterial (LHM) structures are analyzed and measured to verify consistent behavior between theory an measurements. The structures are simulated using a commercial software ...

Thomas Zachary M. (Zachary Michael)

2005-01-01T23:59:59.000Z

79

Progress report of advanced conductor development program at ORNL  

SciTech Connect (OSTI)

This report describes the current research activities related to the development of practical high-field superconducting conductors and magnets at Oak Ridge National Laboratory (ORNL). They can be divided into two categories: (1) 12-T conductor development program, and (2) tests of Nb/sub 3/Sn conductor for the Westinghouse Large Coil Program (LCP) coil. The objective and status of each are presented below.

Shen, S.S.; Fietz, W.A.; Lubell, M.S.

1984-01-01T23:59:59.000Z

80

A review of nano-optics in metamaterial hybrid heterostructures  

SciTech Connect (OSTI)

We present a review for the nonlinear nano-optics in quantum dots doped in a metamaterial heterostructure. The heterostructure is formed by depositing a metamaterial on a dielectric substrate and ensemble of noninteracting quantum dots are doped near the heterostructure interface. It is shown that there is enhancement of the second harmonic generation due to the surface plasmon polaritons field present at the interface.

Singh, Mahi R. [Department of Physics and Astronomy, Western University, London N6G 3K7 (Canada)

2014-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Nanotubes as Robust Thermal Conductors - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Materials Advanced Materials Find More Like This Return to Search Nanotubes as Robust Thermal Conductors Lawrence Berkeley National Laboratory Contact LBL About This...

82

Toward photonic-crystal metamaterials: Creating magnetic emitters in photonic crystals  

E-Print Network [OSTI]

Toward photonic-crystal metamaterials: Creating magnetic emitters in photonic crystals M. L Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge explore the possibility of designing photonic crystals to act as magnetic metamaterials: structures

83

Efficient Applications in User Transparent  

E-Print Network [OSTI]

Chapter 7 Efficient Applications in User Transparent Parallel Image Processing "Thy will by my parallel image processing. First, in Chapter 2 we have discussed the need for the availability is a sustainable software library consisting of an extensive set of operations commonly applied in state

Seinstra, Frank J.

84

Transparent lithium-ion batteries  

Science Journals Connector (OSTI)

...computers). Typically, a battery is composed of electrode...nanotubes (5, 7), graphene (11), and organic...is not suitable for batteries, because, to our knowledge...production of 30-inch graphene films for transparent electrodes...rechargeable lithium batteries . Nature 414 : 359 – 367...

Yuan Yang; Sangmoo Jeong; Liangbing Hu; Hui Wu; Seok Woo Lee; Yi Cui

2011-01-01T23:59:59.000Z

85

Testing of the 3M Company ACCR Conductor  

SciTech Connect (OSTI)

The 3M Company has developed a high-temperature low-sag conductor referred to as Aluminum- Conductor Composite-Reinforced or ACCR. The conductor uses an aluminum metal matrix material to replace the steel in conventional conductors so the core has a lower density and higher conductivity. The objective of this work is to accelerate the commercial acceptance by electric utilities of these new conductor designs by testing four representative conductor classes in controlled conditions. Overhead transmission lines use bare aluminum conductor strands wrapped around a steel core strands to transmit electricity. The typical cable is referred to as aluminum-conductor steel-reinforced (ACSR). The outer strands are aluminum, chosen for its conductivity, low weight, and low cost. The center strand is of steel for the strength required to support the weight without stretching the aluminum due to its ductility. The power density of a transmission corridor has been directly increased by increasing the voltage level. Transmission voltages have increased from 115-kV to 765- kV over the past 80 years. In the United States, further increasing the voltage level is not feasible at this point in time, so in order to further increase the power density of a transmission corridor, conductor designs that increase the current carrying capability have been examined. One of the key limiting factors in the design of a transmission line is the conductor sag which determines the clearance of the conductor above ground or underlying structures needed for electrical safety. Increasing the current carrying capability of a conductor increases the joule heating in the conductor which increases the conductor sag. A conductor designed for high-temperature and lowsag operation requires an engineered modification of the conductor materials. To make an advanced cable, the 3M Company solution has been the development of a composite conductor consisting of Nextel ceramic fibers to replace the steel core and an aluminum-zirconium alloy to improve the outer strands. The result is a cable that can carry more current than steelaluminum lines without sagging as much at higher temperatures. A unique facility called the Powerline Conductor Accelerated Testing (PCAT) Facility was built at ORNL for testing overhead conductors. The PCAT has been uniquely designed for testing overhead bare transmission line conductors at high currents and temperatures after they have been installed and tensioned to the manufacturer's specifications. The ability to operate a transmission line conductor in this manner does not exist elsewhere in the United States. Four classes of ACCR cable designed by 3M have been successfully test at ORNL – small, medium, large and small/compact. Based on these and other manufacturer tests, the 3M Company has successfully introduced the ACCR into the commercial market and has completed over twenty installations for utility companies.

Stovall, J.P.; RIzy, D.T.; Kisner, R.A.; Deve, H.E. (3M Comp.)

2010-09-15T23:59:59.000Z

86

Nonlinear voltages in multiple-lead coherent conductors  

Science Journals Connector (OSTI)

We use the generalized S-matrix approach to study multiple-lead coherent conductors in the case of finite applied voltages. In this framework we discuss the transverse voltage arising in a four-lead conductor with two symmetric biased leads.

Gordey B. Lesovik and Carlo Presilla

1993-01-15T23:59:59.000Z

87

Metamaterial anisotropic flux concentrators and magnetic arrays  

E-Print Network [OSTI]

A metamaterial magnetic flux concentrator is investigated in detail in combination with a Halbach cylinder of infinite length. A general analytical solution to the field is determined and the magnetic figure of merit is determined for a Halbach cylinder with a flux concentrator. It is shown that an ideal flux concentrator will not change the figure of merit of a given magnet design, while the non-ideal will always lower it. The geometric parameters producing maximum figure of merit, i.e. the most efficient devices, are determined. The force and torque between two concentric Halbach cylinders with flux concentrators is determined and the maximum torque is found. Finally, the effect of non-ideal flux concentrators and the practical use of flux concentrators, as well as demagnetization issues, is discussed.

Bjørk, R; Bahl, C R H

2014-01-01T23:59:59.000Z

88

Tunable hyperbolic metamaterials utilizing phase change heterostructures  

SciTech Connect (OSTI)

We present a metal-free tunable anisotropic metamaterial where the iso-frequency surface is tuned from elliptical to hyperbolic dispersion by exploiting the metal-insulator phase transition in the correlated material vanadium dioxide (VO{sub 2}). Using VO{sub 2}-TiO{sub 2} heterostructures, we demonstrate the transition in the effective dielectric constant parallel to the layers to undergo a sign change from positive to negative as the VO{sub 2} undergoes the phase transition. The possibility to tune the iso-frequency surface in real time using external perturbations such as temperature, voltage, or optical pulses creates new avenues for controlling light-matter interaction.

Krishnamoorthy, Harish N. S.; Menon, Vinod M., E-mail: vmenon@qc.cuny.edu [Department of Physics, Queens College of the City University of New York and Center for Photonic and Multiscale Nanomaterials, Queens, New York 11367 (United States); Department of Physics, Graduate Center of the City University of New York, New York, New York 10016 (United States); Zhou, You; Ramanathan, Shriram [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Narimanov, Evgenii [Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

2014-03-24T23:59:59.000Z

89

Transparent Cost Database | Open Energy Information  

Open Energy Info (EERE)

Transparent Cost Database Transparent Cost Database Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Transparent Cost Database Agency/Company /Organization: Department of Energy Partner: National Renewable Energy Laboratory Sector: Energy Focus Area: Renewable Energy, Solar, Transportation Topics: Baseline projection, Low emission development planning, -LEDS, Resource assessment, Technology characterizations Resource Type: Dataset, Lessons learned/best practices, Software/modeling tools User Interface: Website Web Application Link: en.openei.org/apps/TCDB/ Cost: Free OpenEI Keyword(s): Featured Equivalent URI: cleanenergysolutions.org/content/united-states-transparent-cost-databa Language: English The Transparent Cost Database collects program cost and performance

90

Transparency Homework: C. Scott Ananian  

E-Print Network [OSTI]

Ici:pA:hkim ** c. nIci:pa:hkim b ? c * d. nici:pa:hkim f ? d c ? d e. nIcI:pA:hkIm *! a ? e f. nici:pA:hkim b ? fTransparency Homework: Menomini C. Scott Ananian March 5, 2001 Menomini summary: iterative regressive (right­to­left) assimilation of long high [­ATR] vowels ([I:] and [U:]) with following high [+ATR

Ananian, C. Scott

91

Powerline Conductor Accelerated Testing Facility (PCAT) The Powerline Conductor Accelerated Testing facility (PCAT) at Oak Ridge National  

E-Print Network [OSTI]

as simultaneous measuring of conductor tension, sag, and environmental conditions (e.g., wind, solar, ambient environmental conditions. The tests provide both the manufacturer and utilities with conductor performance data under accelerated field-like operating conditions. These tests short-circuit the need for utilities

92

Superconductors and Complex Transition Metal Oxides for Tunable THz Plasmonic Metamaterials  

SciTech Connect (OSTI)

The outline of this presentation are: (1) Motivation - Non-tunability of metal metamaterials; (2) Superconductors for temperature tunable metamaterials; (3) Ultrafast optical switching in superconductor metamaterials; (4) Controlling the conductivity with infrared pump beam; (5) Complex metal oxides as active substrates - Strontium Titanate; and (6) Conclusion. Conclusions are: (1) High Tc superconductors good for tunable and ultrafast metamaterials; (2) Large frequency and amplitude tunability in ultrathin superconductor films; (3) Such tunable properties cannot be accessed using metals; (4) Complex metal oxides can be used as active substrates - large tunability; (5) Complex oxides fail to address the issue of radiation losses in THz metamaterials.

Singh, Ranjan [Los Alamos National Laboratory; Xiong, Jie [Los Alamos National Laboratory; Azad, Md A. [Los Alamos National Laboratory; Yang, Hao [Los Alamos National Laboratory; Trugman, Stuart A. [Los Alamos National Laboratory; Jia, Quanxi [Los Alamos National Laboratory; Taylor, Antoinette [Los Alamos National Laboratory; Chen, Houtong [Los Alamos National Laboratory

2012-07-13T23:59:59.000Z

93

Tuning the response of terahertz metamaterial at low temperatures  

SciTech Connect (OSTI)

The transmission response of planar thin film metamateriaJs were measured at room and liquid nitrogen temperatures using terahertz time-domain spectroscopy. The behaviour of metamaterials at low temperatures is shown to have low-loss since the nonradiative losses are strongly suppressed due to higher metal film conductivity. We observe a temperature tunable effect and a gradual increase of 40% in the quality factor of the metamaterial. The emerging field of metamaterial (MM) has opened a gateway to unprecedented electromagnetic properties and functionality unattainable from naturally occurring materials. Planar metamaterials are made of thin metal films with a thickness comparable to the skin depth. In spite of several newly found potential applications of these metafilms, practical use is often hindered by strong losses of the metallic elements. It causes a weakening and a damping of the resonance. This makes dissipation the property that dominates the light propagation. Therefore, the compensation of such losses is currently the most important topic to solve prior to advancing MMs to a higher level. Overall metamaterial losses typically have a radiative contribution, which can be tailored by suitable geometrical modifications, and a non-radiative contribution, associated to the intrinsic absorption of the light in the metal and/or dielectric. Thus, one way to improve their performance is to increase the conductivity of the metals. A simple technique to increase the metal conductivity is to cool it to low temperatures.

Singh, Ranjan [Los Alamos National Laboratory; O' Hara, John F [Los Alamos National Laboratory; Taylor, Antoinette [Los Alamos National Laboratory; Zhang, Weili [OKLAHOMA STATE UNIV; Tian, Zhen [OKLAHOMA STATE UNIV; Han, Jiaguang [NATIONAL UNIV OF SINGAPORE; Rockstukl, Carsten [FRIEDRICH-SCHILLER-UNIV JENA; Gu, Jianqiang [OKLAHOMA STATE UNIV

2010-01-01T23:59:59.000Z

94

Thermally Induced Nonlinear Optical Absorption in Metamaterial Perfect Absorbers  

E-Print Network [OSTI]

A metamaterial perfect absorber consisting of a tri-layer (Al/ZnS/Al) metal-dielectric-metal system with top aluminium nano-disks is fabricated by laser-interference lithography and lift-off processing. The metamaterial absorber had peak resonant absorbance at 1090 nm and showed nonlinear absorption for 600ps laser pulses at 1064 nm wavelength. A nonlinear saturation of reflectance was measured to be dependent on the average laser power incident and not the peak laser intensity. The nonlinear behaviour is shown to arise from the heating due to the absorbed radiation and photo-thermal changes in the dielectric properties of aluminium. The metamaterial absorber is seen to be damage resistant at large laser intensities of 25 MW/cm2.

Guddala, Sriram; Ramakrishna, S Anantha

2015-01-01T23:59:59.000Z

95

Optical precursors in transparent media  

Science Journals Connector (OSTI)

We theoretically study the linear propagation of a stepwise pulse through a dilute dispersive medium when the frequency of the optical carrier coincides with the center of a natural or electromagnetically induced transparency window of the medium (slow-light systems). We obtain fully analytical expressions of the entirety of the step response and show that, for parameters representative of real experiments, Sommerfeld-Brillouin precursors, main field and second precursors (“postcursors”) can be distinctly observed, all with amplitudes comparable to that of the incident step. This behavior strongly contrasts with that of the systems generally considered up to now.

Bruno Macke and Bernard Ségard

2009-07-16T23:59:59.000Z

96

One-way glass for microwaves using nonreciprocal metamaterials  

Science Journals Connector (OSTI)

We introduce a class of nonreciprocal metamaterials based on composite assemblies of metallic and biased ferrimagnetic elements. We show that such structures act as ultrathin one-way glasses due to the competition between two modes at the surface of the ferrimagnetic elements—a low-loss surface wave that transmits the signal on the other side of the structure and a surface spin-wave resonance that produces strong isolation levels. These findings can be adapted to existing metamaterial geometries, offering a blueprint to achieve unidirectional propagation in a variety of artificial media at radio, microwave, and millimeter wave frequencies.

A. Degiron and D. R. Smith

2014-05-27T23:59:59.000Z

97

Conductor for a fluid-cooled winding and method for making same  

SciTech Connect (OSTI)

A conductor and method of making the conductor are provided for use in winding electrical coils which are cooled by a fluid communicating with the conductor. The conductor is cold worked through twisting and reshaping steps to form a generally rectangular cross section conductor having a plurality of helical cooling grooves extending axially of the conductor. The conductor configuration makes it suitable for a wide variety of winding applications and permits the use of simple strip insulation between turns and perforated sheet insulation between layers of the winding.

Kenney, W.J.

1981-05-12T23:59:59.000Z

98

High temperature, optically transparent plastics from biomass  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

temperature, optically transparent plastics from biomass At a Glance Rapid, selective catalytic system to produce vinyl plastics from renewable biomass Stereoregular...

99

Angular selective semi-transparent photovoltaics  

Science Journals Connector (OSTI)

Conventional semi-transparent photovoltaics suffer from an inherent tradeoff between the amount of visible light transmitted versus absorbed, reducing energy conversion efficiency when...

Roberts, Brian; Nanditha, D M; Dissanayake, M; Ku, P -C

2012-01-01T23:59:59.000Z

100

Transparant ductility: Reinforcing a structural glass girder:.  

E-Print Network [OSTI]

??Transparency and light are hot items in building design and massive structural elements often form an unwelcome necessity for architects. The structural use of glass… (more)

Rademakers, M.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Lawrence Pack, train conductor, and Y-12s uranium  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lawrence Pack, train conductor, and Y-12's uranium? Trains were the primary means of long haul transportation in the 1940's. Many trains brought building materials to Y-12 and...

102

Critical Current Metrology for Nb3Sn Conductor Development  

SciTech Connect (OSTI)

The research is focused on the variable temperature studies of high-performance Nb3Sn and other high-field conductors for the next-generation of HEP magnets.

Goodrich, Loren F. [NIST

2013-12-13T23:59:59.000Z

103

Embedded-Circuit Magnetic Metamaterial Substrate Performance for Patch Antennas  

E-Print Network [OSTI]

Embedded-Circuit Magnetic Metamaterial Substrate Performance for Patch Antennas Kevin Buell and Computer Science University of Michigan Ann Arbor, MI 48109-2122, USA E-mail: kbuell@umich.edu, hosseinm@umich.edu, saraband@eecs.umicb.edu Abstract Magnetic permeabilitywas imparted to a naturally non-magnetic materialby

Sarabandi, Kamal

104

Complex Doppler effect in left-handed metamaterials  

E-Print Network [OSTI]

The Doppler shift is investigated in one-dimensional system with moving source. Theoretical findings are confirmed in numerical simulations of optical and acoustical waves propagation in simple metamaterial model, showing the reversed shift and the existence of multiple frequency modes. The properties of these waves are discussed. The effect of absorption on the phenomenon is outlined.

Ziemkiewicz, David

2014-01-01T23:59:59.000Z

105

Optically Transparent, Electrically Conductive Composite Medium  

Science Journals Connector (OSTI)

...found below and above these two lower shale beds. Although it is possible that reworking...by the three shocked quartz-bearing shales, but there are at least 250 m of Norian...of the transparent composite medium. anisotropic. The transparency along the ver-tical...

S. JIN; T. H. TIEFEL; R. WOLFE; R. C. SHERWOOD; J. J. MOTTINE JR.

1992-01-24T23:59:59.000Z

106

Transparent lithium-ion batteries , Sangmoo Jeongb  

E-Print Network [OSTI]

, and solar cells; however, transparent batteries, a key component in fully integrated transparent devices by a microfluidics-assisted method. The feature dimension in the electrode is below the resolution limit of human (11), and solar cells (12­14). However, the battery, a key component in portable electronics, has

Cui, Yi

107

Graphene-based tunable hyperbolic metamaterials and enhanced near-field absorption  

Science Journals Connector (OSTI)

We investigate a novel implementation of hyperbolic metamaterial (HM) at far-infrared frequencies composed of stacked graphene sheets separated by thin dielectric layers. Using the...

Othman, Mohamed A K; Guclu, Caner; Capolino, Filippo

2013-01-01T23:59:59.000Z

108

Cryogenic temperature measurement of THz meta-resonance in symmetric metamaterial superlattice  

Science Journals Connector (OSTI)

A symmetric metamaterial superlattice is introduced accommodating a high Q-factor trapped mode. THz time-domain spectroscopy is employed to measure the transmission spectra,...

Woo, J H; Kim, E S; Choi, E; Kang, Boyoung; Lee, Hyun-Hee; Kim, J; Lee, Y U; Hong, Tae Y; Kim, Jae H; Wu, J W

2011-01-01T23:59:59.000Z

109

Use of ion conductors in the pyrochemical reduction of oxides  

DOE Patents [OSTI]

An electrochemical process and electrochemical cell for reducing a metal oxide are provided. First the oxide is separated as oxygen gas using, for example, a ZrO[sub 2] oxygen ion conductor anode and the metal ions from the reduction salt are reduced and deposited on an ion conductor cathode, for example, sodium ion reduced on a [beta]-alumina sodium ion conductor cathode. The generation of and separation of oxygen gas avoids the problem with chemical back reaction of oxygen with active metals in the cell. The method also is characterized by a sequence of two steps where an inert cathode electrode is inserted into the electrochemical cell in the second step and the metallic component in the ion conductor is then used as the anode to cause electrochemical reduction of the metal ions formed in the first step from the metal oxide where oxygen gas formed at the anode. The use of ion conductors serves to isolate the active components from chemically reacting with certain chemicals in the cell. While applicable to a variety of metal oxides, the invention has special importance for reducing CaO to Ca[sup o] used for reducing UO[sub 2] and PuO[sub 2] to U and Pu. 2 figures.

Miller, W.E.; Tomczuk, Z.

1994-02-01T23:59:59.000Z

110

Designing Transparency Systems for Medical Care Prices  

Science Journals Connector (OSTI)

...back to a hospital could not be "reverse-engineered" to determine the prices charged by competing hospitals to any particular payer. Health care is not the only industry in which price transparency and MFN agreements have led to higher prices. In response to concerns that the highly concentrated suppliers... In the contentious political environment surrounding health care reform, calls for increased price transparency in health care are among the few areas of general agreement. But the wrong kind of transparency could actually harm patients, rather than help them.

Cutler D.; Dafny L.

2011-03-10T23:59:59.000Z

111

Physical properties of highly oriented spray-deposited fluorine-doped tin dioxide films as transparent conductor  

Science Journals Connector (OSTI)

Heavily fluorine-doped tin dioxide films were deposited by spray pyrolysis using a high precursor concentration. The effect of film thickness was studied in the range 80–1230 nm. The films were polycrystalline and preferentially oriented along [2 0 0]. The grain size, carrier mobility ?, carrier concentration N and resistivity reached ?230 nm, 35 cm2/V s, 6×1020 cm?3 and 3×10?4 ? cm, respectively, for 1000 nm films. An unusual ‘direct and linear’ ?–N dependence revealed the importance of the structural properties. The 1000 nm thick films possessed an average visible transmittance ?81% and a reflectance ?66% at 2500 nm. The electro-optical properties revealed their excellent quality as a TCO material.

Chitra Agashe; J. Hüpkes; G. Schöpe; M. Berginski

2009-01-01T23:59:59.000Z

112

Tuning the Properties of Transparent Oxide Conductors. Dopant Ion Size and Electronic Structure Effects on CdO-Based  

E-Print Network [OSTI]

on the CdO- based TCO structural, electronic, and optical properties: (1) lattice parameters contract as key components in optoelectronic devices such as flat panel displays (FPDs), organic light-emitting diodes (OLEDs), photovoltaics, solar cells, optical waveguides, and energy-efficient windows.1

Medvedeva, Julia E.

113

Scientists produce transparent, light-harvesting material  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transparent, light-harvesting material Transparent, light-harvesting material Scientists produce transparent, light-harvesting material The material could be used in development of transparent solar panels. November 3, 2010 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Contact James E. Rickman Communications Office (505) 665-9203

114

Beyond transparency : collective engagement in sustainable design  

E-Print Network [OSTI]

For a timely answer to the question of sustainability, or how to provide for future generations, there needs to be shared accounting of our social and physical resources. Supply chain transparency makes it possible to map ...

Bonanni, Leonardo Amerigo, 1977-

2010-01-01T23:59:59.000Z

115

The erosion resistance of infrared transparent materials  

Science Journals Connector (OSTI)

...research-article The erosion resistance of infrared transparent materials E.J. Coad C.S...discussed. erosion resistance|infrared materials|liquid impact...Keywords: erosion resistance; infrared materials; liquid impact...

1998-01-01T23:59:59.000Z

116

Subtask 5: Functional nanostructured transparent electrode materials...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5: Functional nanostructured transparent electrode materials All papers by year Subtask 1 Subtask 2 Subtask 3 Subtask 4 Subtask 5 Jeon, K.-W. and Seo, D.-K.(2014)Concomitant...

117

High Transparency of Classically Opaque Metallic Films  

Science Journals Connector (OSTI)

It is demonstrated, both theoretically and experimentally, that a classically opaque metallic film can appear highly transparent when the conditions are established for the incident electromagnetic wave to excite coupled surface modes on both sides of the film.

R. Dragila; B. Luther-Davies; S. Vukovic

1985-09-02T23:59:59.000Z

118

New device reduces conductor burndown on distribution circuits  

SciTech Connect (OSTI)

Laboratory tests of an arcing clamp-type device indicate that it gives more protection against conductor burndown on covered distribution circuits. Experiments were designed to study the effects of direct lightning strokes and examine damage characteristics. This led to the conclusion that conventional overcurrent protection devices having high continuous current ratings were inadequate to prevent burndown and some kind of phase conductor protection was needed. Tests indicate that aluminum clamps installed on both sides of a stripped cover provide a lightning flashover path. (DCK)

Lee, R.E. (Pennsylvania Power and Light Co., Allentown); Fritz, D.E.; Stiller, P.H.; Kilar, L.A.; Shankle, D.F.

1980-08-01T23:59:59.000Z

119

Transparent conducting oxides and production thereof  

SciTech Connect (OSTI)

Transparent conducting oxides and production thereof are disclosed. An exemplary method of producing a transparent conducting oxide (TCO) material may comprise: providing a TCO target doped with either a high-permittivity oxide or a low-permittivity oxide in a process chamber. The method may also comprise depositing a metal oxide on the target in the process chamber to form a thin film having enhanced optical properties without substantially decreasing electrical quality.

Gessert, Timothy A.; Yoshida, Yuki; Coutts, Timothy J.

2014-06-10T23:59:59.000Z

120

Transparent conducting oxides and production thereof  

SciTech Connect (OSTI)

Transparent conducting oxides and production thereof are disclosed. An exemplary method of producing a transparent conducting oxide (TCO) material may comprise: providing a TCO target (110) doped with either a high-permittivity oxide or a low-permittivity oxide in a process chamber (100). The method may also comprise depositing a metal oxide on the target (110) to form a thin film having enhanced optical properties without substantially decreasing electrical quality.

Gessert, Timothy A; Yoshida, Yuki; Coutts, Timothy J

2014-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Ice-Shedding Vibration Measurement from Conductors Using Binocalor Vision Method  

Science Journals Connector (OSTI)

Ice-shedding will cause the violent oscillation of the lines, and makes the conductors jumping up and down. The jumping of the conductors reduces the phase-to-phase clearance, even leads to interphase flashover a...

Zhu He; Li Na; Li Hongqing

2012-01-01T23:59:59.000Z

122

Dynamic frequency tuning of electric and magnetic metamaterial response  

DOE Patents [OSTI]

A geometrically modifiable resonator is comprised of a resonator disposed on a substrate, and a means for geometrically modifying the resonator. The geometrically modifiable resonator can achieve active optical and/or electronic control of the frequency response in metamaterials and/or frequency selective surfaces, potentially with sub-picosecond response times. Additionally, the methods taught here can be applied to discrete geometrically modifiable circuit components such as inductors and capacitors. Principally, controlled conductivity regions, using either reversible photodoping or voltage induced depletion activation, are used to modify the geometries of circuit components, thus allowing frequency tuning of resonators without otherwise affecting the bulk substrate electrical properties. The concept is valid over any frequency range in which metamaterials are designed to operate.

O'Hara, John F; Averitt, Richard; Padilla, Willie; Chen, Hou-Tong

2014-09-16T23:59:59.000Z

123

From Josephson junction metamaterials to tunable pseudo-cavities  

E-Print Network [OSTI]

The scattering through a Josephson junction interrupting a superconducting line is revisited including power leakage. We discuss also how to make tunable and broadband resonant mirrors by concatenating junctions. As an application, we show how to construct cavities using these mirrors, thus connecting two research fields: JJ quantum metamaterials and coupled cavity arrays. We finish by discussing the first non-linear corrections to the scattering and their measurable effects.

D. Zueco; C. Fernández-Juez; J. Yago; U. Naether; B. Peropadre; J. J. García-Ripoll; J. J. Mazo

2013-05-21T23:59:59.000Z

124

Cryogenic temperatures as a path toward high-Q terahertz metamaterials Ranjan Singh,1,2  

E-Print Network [OSTI]

Cryogenic temperatures as a path toward high-Q terahertz metamaterials Ranjan Singh,1,2 Zhen Tian,1 terahertz time-domain spectroscopy. The operation of metamaterials at cryogenic temperatures is anticipated we investigate the behavior of terahertz planar MM at cryogenic temperatures. It is shown that thin

Oklahoma State University

125

Nonlocal homogenization theory in metamaterials: effective electromagnetic spatial dispersion and artificial chirality  

E-Print Network [OSTI]

We develop, from first principles, a general and compact formalism for predicting the electromagnetic response of a metamaterial with non-magnetic inclusions in the long wavelength limit, including spatial dispersion up to the second order. Specifically, by resorting to a suitable multiscale technique, we show that medium effective permittivity tensor and the first and second order tensors describing spatial dispersion can be evaluated by averaging suitable spatially rapidly-varying fields each satysifing electrostatic-like equations within the metamaterial unit cell. For metamaterials with negligible second-order spatial dispersion, we exploit the equivalence of first-order spatial dispersion and reciprocal bianisotropic electromagnetic response to deduce a simple expression for the metamaterial chirality tensor. Such an expression allows us to systematically analyze the effect of the composite spatial symmetry properties on electromagnetic chirality. We find that even if a metamaterial is geometrically achi...

Ciattoni, Alessandro

2015-01-01T23:59:59.000Z

126

High Strength Composite Conductors 2009 NHMFL Science Highlight for NSF  

E-Print Network [OSTI]

High Strength Composite Conductors 2009 NHMFL Science Highlight for NSF DMR-Award 0654118 Magnet the detailed nature of interfaces in the Cu­Nb multilayered composite system from which the high strength arises. Two types of orientation relationships were observed within 0.1 nanometers in the composite

Weston, Ken

127

Development of a composite-reinforced aluminum conductor  

SciTech Connect (OSTI)

Fact sheet written for the Inventions and Innovation Program about a new composite-reinforced aluminum conductor for utility transmission and distribution. The millions of people affected by a blackout in the western US, Canada, and parts of Mexico in July 1996 had no idea the power outage was caused by overloaded transmission lines sagging low enough to touch trees. Millions of New Englanders affected by power outages during the 1997--98 winter probably weren't aware that accumulations of ice and snow on transmission lines had caused the lines to snap. Yet, these two examples illustrate the urgent need to begin upgrading this country's aging electrical-power distribution systems. A key step in this process lies in improving the weight and conductivity characteristics of utility transmission and distribution lines. Conventional conductors used for overhead transmission and distribution lines are comprised of aluminum strands of wire wrapped around a steel core. The aluminum serves as the electrical conductor, while the steel provides mechanical support. This hybrid design results in an excellent weight-to-conductivity ratio, but it also yields a heavier product, which requires stronger and more costly support structures and limits conductivity. W. Brandt Goldsworthy and Associates, Inc., of Torrance, California, is developing a new composite-reinforced aluminum conductor to replace aging steel-core lines. The new composite conductor is lighter, stronger, and carries a higher current capacity than traditional power lines. The technology has been designed primarily for domestic utility transmission and distribution systems. This application takes the highest priority as utility deregulation continues to increase the demand for direct-power access. Subsequent applications exist through opportunities in the industrial power, building wire, telecommunications and data transmission, and high-temperature superconductor markets. Similar applications overseas also represent tremendous potential, with growth projected at 10 times that of the United States market.

Balsam, J.

1999-11-11T23:59:59.000Z

128

Wave propagation in photonic crystals and metamaterials: Surface waves, nonlinearity and chirality  

SciTech Connect (OSTI)

Photonic crystals and metamaterials, both composed of artificial structures, are two interesting areas in electromagnetism and optics. New phenomena in photonic crystals and metamaterials are being discovered, including some not found in natural materials. This thesis presents my research work in the two areas. Photonic crystals are periodically arranged artificial structures, mostly made from dielectric materials, with period on the same order of the wavelength of the working electromagnetic wave. The wave propagation in photonic crystals is determined by the Bragg scattering of the periodic structure. Photonic band-gaps can be present for a properly designed photonic crystal. Electromagnetic waves with frequency within the range of the band-gap are suppressed from propagating in the photonic crystal. With surface defects, a photonic crystal could support surface modes that are localized on the surface of the crystal, with mode frequencies within the band-gap. With line defects, a photonic crystal could allow the propagation of electromagnetic waves along the channels. The study of surface modes and waveguiding properties of a 2D photonic crystal will be presented in Chapter 1. Metamaterials are generally composed of artificial structures with sizes one order smaller than the wavelength and can be approximated as effective media. Effective macroscopic parameters such as electric permittivity {epsilon}, magnetic permeability {mu} are used to characterize the wave propagation in metamaterials. The fundamental structures of the metamaterials affect strongly their macroscopic properties. By designing the fundamental structures of the metamaterials, the effective parameters can be tuned and different electromagnetic properties can be achieved. One important aspect of metamaterial research is to get artificial magnetism. Metallic split-ring resonators (SRRs) and variants are widely used to build magnetic metamaterials with effective {mu} < 1 or even {mu} < 0. Varactor based nonlinear SRRs are built and modeled to study the nonlinearity in magnetic metamaterials and the results will be presented in Chapter 3. Negative refractive index n is one of the major target in the research of metamaterials. Negative n can be obtained with a metamaterial with both {epsilon} and {mu} negative. As an alternative, negative index for one of the circularly polarized waves could be achieved with metamaterials having a strong chirality ?. In this case neither {epsilon} nor {mu} negative is required. My work on chiral metamaterials will be presented in Chapter 4.

Wang, Bingnan

2009-12-03T23:59:59.000Z

129

A Testing Platform for Validation of Overhead Conductor Aging Models and Understanding Thermal Limits  

SciTech Connect (OSTI)

Power system equipment manufacturers and researchers continue to experiment with novel overhead electric conductor designs that support better conductor performance and address congestion issues. To address the technology gap in testing these novel designs, Oak Ridge National Laboratory constructed the Powerline Conductor Accelerated Testing (PCAT) facility to evaluate the performance of novel overhead conductors in an accelerated fashion in a field environment. Additionally, PCAT has the capability to test advanced sensors and measurement methods for accessing overhead conductor performance and condition. Equipped with extensive measurement and monitoring devices, PCAT provides a platform to improve/validate conductor computer models and assess the performance of novel conductors. The PCAT facility and its testing capabilities are described in this paper.

Irminger, Philip [ORNL; Starke, Michael R [ORNL; Dimitrovski, Aleksandar D [ORNL; Young II, Marcus Aaron [ORNL; Rizy, D Tom [ORNL; Stovall, John P [ORNL; Overholt, Philip N [U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability (OE)

2014-01-01T23:59:59.000Z

130

Fabrication of transparent ceramics using nanoparticles  

DOE Patents [OSTI]

A method of fabrication of a transparent ceramic using nanoparticles synthesized via organic acid complexation-combustion includes providing metal salts, dissolving said metal salts to produce an aqueous salt solution, adding an organic chelating agent to produce a complexed-metal sol, heating said complexed-metal sol to produce a gel, drying said gel to produce a powder, combusting said powder to produce nano-particles, calcining said nano-particles to produce oxide nano-particles, forming said oxide nano-particles into a green body, and sintering said green body to produce the transparent ceramic.

Cherepy, Nerine J; Tillotson, Thomas M; Kuntz, Joshua D; Payne, Stephen A

2012-09-18T23:59:59.000Z

131

Transition metal-promoted oxygen ion conductors as oxidation catalyst  

SciTech Connect (OSTI)

A novel metal oxide composite catalyst for the complete oxidation of carbon monoxide and hydrocarbons was prepared by combining oxygen ion conducting materials with active transition metals. The oxygen ion conductors used were typical fluorite-type oxides, such as ceria, zirconia, and others. Active base metal catalysts, such as copper, were used as additives to promote the catalytic properties of oxygen ion conductors. The intimate contact of the two kinds of materials gave rise to a highly active oxidation catalyst. On Cu-Ce-O composite catalysts, 95% of carbon monoxide was oxidized by air at {approximately} 100 C. Complete methane oxidation on the same catalyst took place at {approximately} 550 C. When the stoichiometric amount of sulfur dioxide was sued to oxidize carbon monoxide, 96% of sulfur dioxide was reduced to elemental sulfur at temperatures above 460 C with 99% of sulfur dioxide conversion. This type of composite catalyst also showed excellent resistance to water poisoning.

Liu, W.; Sarofim, A. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering; Flytzani-Stephanopoulos, M. [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering

1994-12-31T23:59:59.000Z

132

A tunable metamaterial dependent on electric field at terahertz with barium strontium titanate thin film  

SciTech Connect (OSTI)

A tunable metamaterial with resonance frequency at terahertz (THz) was developed. Electromagnetic response of the metamaterial was characterized with THz time domain spectrometer at various direct current electric fields. The resonance frequency increased monotonously with increasing electric field. The finite difference time domain method was used to simulate the transmission spectra of the metamaterial at THz frequencies. By comparing the simulated resonance frequency with the experimental curve, dielectric property of the Ba{sub 0.6}Sr{sub 0.4}TiO{sub 3} (BST60) thin film at THz, over 0–33?kV/cm, was evaluated.

Bian, Yanlong; Zhai, Jiwei, E-mail: apzhai@tongji.edu.cn [Function Materials Research Laboratory, Tongji University, Shanghai 200092 (China); Wu, Chao; Li, Hongqiang [Department of Physics Science and Engineering, Tongji University, Shanghai 200092 (China)

2014-01-27T23:59:59.000Z

133

Thermoelectric effects in organic conductors in a strong magnetic field  

SciTech Connect (OSTI)

The linear response of the electron system of a layered conductor to the temperature gradient in this system in a strong magnetic field is investigated theoretically. Thermoelectric emf is studied as a function of the magnitude and orientation of a strong external magnetic field; the experimental investigation of this function, combined with the study of the electric and thermal resistance, allows one to completely determine the structure of the energy spectrum of charge carriers.

Kirichenko, O. V.; Peschanskii, V. G. [National Academy of Sciences of Ukraine, Verkin Institute for Low Temperature Physics and Engineering (Ukraine)], E-mail: vpeschansky@ilt.kharkov.ua; Hasan, R. A. [Bir-Zeit University (Autonomy of Palestine) (Country Unknown)

2007-07-15T23:59:59.000Z

134

E#cient Applications in User Transparent  

E-Print Network [OSTI]

Chapter 7 E#cient Applications in User Transparent Parallel Image Processing # ''Thy will by my parallel image processing. First, in Chapter 2 we have discussed the need for the availability is a sustainable software library consisting of an extensive set of operations commonly applied in state

Seinstra, Frank J.

135

Nanostructured Transparent Conducting Oxides via Blockcopolymer Patterning  

E-Print Network [OSTI]

for transparent electrodes in optoelectronic devices. However, the high cost and scarcity of indium as well as di#0;culties of processing ITO has motivated a search for other materials that can potentially replace ITO as demand grows. Com- monly investigated...

Kim, Joung Youn Ellie

2014-05-27T23:59:59.000Z

136

In the OSTI Collections: Metamaterials | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

Metamaterials Metamaterials Negative refractive index Varying the response to terahertz light Other devices Solving technical problems References Research Organizations Reports available from OSTI's Information Bridge Any material's physical properties are determined by what types of atoms it is made of and how those atoms are arranged. In an ordinary solid material, the atoms are arranged in basic, roughly nanometer-size units of a few atoms each, repeated over and over in an extensive wallpaper-like pattern. Metamaterials are artificially structured materials with much larger repeating units that contain more atoms per unit. Since there are more possible ways to arrange larger sets of atoms than smaller sets, metamaterials have a greater possible range of physical properties than ordinary solids do.

137

Transmission-Line Metamaterial Design of an Embedded Line Source in a Ground Recess.  

E-Print Network [OSTI]

??A transmission-line metamaterial design of a material-embedded electric line source radiating inside a ground recess is investigated. The media embedding the recessed line source are… (more)

EMIROGLU, CAGLAR D

2011-01-01T23:59:59.000Z

138

Fast tuning of Fano resonance in metal/phase-change materials/metal metamaterials  

Science Journals Connector (OSTI)

We propose fast tuning of a Fano resonance (FR) in a three dimensional metamaterial (MM). The MM consists of an elliptical nanohole array (ENA) embedded through a metal/ phase-change...

Cao, Tun; Wei, Chenwei; Simpson, Robert E; Zhang, Lei; Cryan, Martin J

2014-01-01T23:59:59.000Z

139

Near-Field Radiative Heat Transfer between Metamaterials coated with Silicon Carbide Film  

E-Print Network [OSTI]

In this letter, we study the near-field radiative heat transfer between two metamaterial substrates coated with silicon carbide (SiC) thin films. It is known that metamaterials can enhance the near-field heat transfer over ordinary materials due to excitation of magnetic plasmons associated with s polarization, while strong surface phonon polariton exists for SiC.By careful tuning of the optical properties of metamaterial it is possible to excite electrical and magnetic resonance for the metamaterial and surface phonon polaritons for SiC at different spectral regions, resulting in the enhanced heat transfer. The effect of the SiC film thickness at different vacuum gaps is investigated. Results obtained from this study will be beneficial for application of thin film coatings for energy harvesting.

Basu, Soumyadipta; Wang, Liping

2014-01-01T23:59:59.000Z

140

Graphene based tunable metamaterial absorber and polarization modulation in terahertz frequency  

Science Journals Connector (OSTI)

Graphene can be utilized in designing tunable terahertz devices due to its tunability of sheet conductivity. In this paper, we combine the metamaterial having unit cell of cross-shaped...

Zhang, Yin; Feng, Yijun; Zhu, Bo; Zhao, Junming; Jiang, Tian

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Cryogenic temperature measurement of THz meta-resonance in symmetric metamaterial superlattice  

Science Journals Connector (OSTI)

We investigated a change in the Q-factor of THz meta-resonance as a function of temperature in a symmetric metamaterial superlattice composed by double-split ring resonators (DSRR)....

Woo, J H; Kim, E S; Kang, Boyoung; Choi, E Y; Lee, Hyun-Hee; Kim, J; Lee, Y U; Hong, Tae Y; Kim, Jae H; Wu, J W

142

Carbon Layers Lead the Way towards a New Generation of Metamaterials...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Layers Lead the Way towards a New Generation of Metamaterials Graphene - a one layer thick sheet of carbon atoms - has special properties that make it a desirable material...

143

Doppler effects of a light source on a metamaterial slab: a rigorous Green's function approach  

Science Journals Connector (OSTI)

We apply a (rigorous) Green's function theory to study the Doppler effects of a light source placed on top of a metamaterial slab. When the receiver is in motion with the source and...

Wang, Weihua; Huang, Xueqin; Zhou, Lei; Chan, C T

2008-01-01T23:59:59.000Z

144

Topological modes bound to dislocations in mechanical metamaterials  

E-Print Network [OSTI]

Mechanical metamaterials are artificial structures with unusual properties, such as negative Poisson ratio, bistability or tunable vibrational properties, that originate in the geometry of their unit cell. At the heart of such unusual behaviour is often a soft mode: a motion that does not significantly stretch or compress the links between constituent elements. When activated by motors or external fields, soft modes become the building blocks of robots and smart materials. Here, we demonstrate the existence of topological soft modes that can be positioned at desired locations in a metamaterial while being robust against a wide range of structural deformations or changes in material parameters. These protected modes, localized at dislocations, are the mechanical analogue of topological states bound to defects in electronic systems. We create physical realizations of the topological modes in prototypes of kagome lattices built out of rigid triangular plates. We show mathematically that they originate from the interplay between two Berry phases: the Burgers vector of the dislocation and the topological polarization of the lattice. Our work paves the way towards engineering topologically protected nano-mechanical structures for molecular robotics or information storage and read-out.

Jayson Paulose; Bryan Gin-ge Chen; Vincenzo Vitelli

2014-06-12T23:59:59.000Z

145

Vertically aligned gas-insulated transmission line having particle traps at the inner conductor  

DOE Patents [OSTI]

Gas insulated electrical apparatus having first and second conductors separated by an insulating support within an insulating gas environment, and particle traps disposed along the surface of the high potential conductor for trapping and inactivating foreign particles which may be present within the insulating gas medium. Several embodiments of the invention were developed which are particularly suited for vertically aligned gas insulated transmission lines. The particle traps are grooves or cavities formed into the walls of the tubular inner conductor, without extending into the hollow portion of the conductor. In other embodiments, the traps are appendages or insert flanges extending from the inner conductor, with the insulator supports contacting the appendages instead of the inner conductor.

Dale, Steinar J. (Monroeville, PA)

1984-01-01T23:59:59.000Z

146

Semi-flexible gas-insulated transmission line using protection tube in conductor plug-in joint  

DOE Patents [OSTI]

A gas-insulated transmission line includes an outer sheath, an inner conductor, an insulating gas electrically insulating the inner conductor from the outer sheath, and insulating supports insulatably supporting the inner conductor within the outer sheath. The inner conductor is provided with flexibility by main conductor sections which are joined together through a conductor hub section and flexible flexing elements. Stress shields are provided to control the electric field at the locations of the conductor hub sections where the insulating supports are contacting the inner conductor. A plug and socket arrangement is utilized for joining adjacent sections of the inner conductor, and a protection tube is utilized inside the hollow plug to maintain proper alignment of the joint when the transmission line is bent.

Kommineni, Prasad R. (Westboro, MA)

1983-01-25T23:59:59.000Z

147

E-Print Network 3.0 - anticipated organic conductors Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mathematics 6 Novel Automatic PCB Inspection Technique Based on Connectivity MAURO HIROMU TATIBANA Summary: to extract the connectivity information of the conductors of...

148

E-Print Network 3.0 - atlas semi conductor Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas semi conductor Page: << < 1 2 3 4 5 > >> 1 ATLAS & Particle Detection The ATLAS...

149

CNM Highlight: Quantum Dot-Induced Transparency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Quantum Dot-Induced Transparency Quantum Dot-Induced Transparency Using rigorous and realistic numerical simulations, staff in the Nanophotonics and Theory and Modeling groups have recently demonstrated that a single semiconductor nanocrystal, or quantum dot, can cancel the scattering and absorption by a much larger metal nanostructure. Placing a quantum dot near a metal is known to strongly modify the rate at which the dot emits light. If the interaction between the dot and the metal is strong enough, scattering and absorption by the metal can be nearly eliminated at the quantum-dot resonance frequency, according to the simulations. This occurs even though the dot by itself simply absorbs light, and even though this absorption is nearly 100,000 times smaller than absorption by the metal nanostructure.

150

Theory of Dipole Induced Electromagnetic Transparency  

E-Print Network [OSTI]

A detailed theory describing linear optics of vapors comprised of interacting multi-level quantum emitters is proposed. It is shown both by direct integration of Maxwell-Bloch equations and using a simple analytical model that at large densities narrow transparency windows appear in otherwise completely opaque spectra. The existence of such windows is attributed to overlapping resonances. This effect, first introduced for three-level systems in [R. Puthumpally-Joseph, M. Sukharev, O. Atabek and E. Charron, Phys. Rev. Lett. 113, 163603 (2014)], is due to strongly enhanced dipole-dipole interactions at high emitters' densities. The presented theory extends this effect to the case of multilevel systems. The theory is applied to the D1 transitions of interacting Rb-85 atoms. It is shown that at high atomic densities, Rb-85 atoms can behave as three-level emitters exhibiting all the properties of dipole induced electromagnetic transparency. Applications including slow light and laser pulse shaping are also propose...

Puthumpally-Joseph, Raiju; Sukharev, Maxim; Charron, Eric

2015-01-01T23:59:59.000Z

151

PT-Symmetric Optomechanically-Induced Transparency  

E-Print Network [OSTI]

Optomechanically-induced transparency (OMIT) and the associated slow-light propagation provide the basis for storing photons in nanofabricated phononic devices. Here we study OMIT in parity-time (PT)-symmetric microresonators with a tunable gain-to-loss ratio. This system features a reversed, non-amplifying transparency: inverted-OMIT. When the gain-to-loss ratio is steered, the system exhibits a transition from the PT-symmetric phase to the broken-PT-symmetric phase. We show that by tuning the pump power at fixed gain-to-loss ratio or the gain-to-loss ratio at fixed pump power, one can switch from slow to fast light and vice versa. Moreover, the presence of PT-phase transition results in the reversal of the pump and gain dependence of transmission rates. These features provide new tools for controlling light propagation using optomechanical devices.

H. Jing; S. K. Özdemir; Z. Geng; J. Zhang; X. -Y. Lü; B. Peng; L. Yang; F. Nori

2014-12-09T23:59:59.000Z

152

Transparent heat-spreader for optoelectronic applications  

DOE Patents [OSTI]

An optoelectronic cooling system is equally applicable to an LED collimator or a photovoltaic solar concentrator. A transparent fluid conveys heat from the optoelectronic chip to a hollow cover over the system aperture. The cooling system can keep a solar concentrator chip at the same temperature as found for a one-sun flat-plate solar cell. Natural convection or forced circulation can operate to convey heat from the chip to the cover.

Minano, Juan Carlos; Benitez, Pablo

2014-11-04T23:59:59.000Z

153

Promoting NEPA Transparency and Public Engagement | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Promoting NEPA Transparency and Public Engagement Promoting NEPA Transparency and Public Engagement Promoting NEPA Transparency and Public Engagement June 3, 2011 - 1:14pm Addthis "NEPA is, at its core, a transparency statute," said Katie Scharf, Council on Environmental Quality (CEQ) Deputy General Counsel, in opening a panel discussion on using information technology to support open government initiatives, engage the public, and add value to NEPA analysis. At the March 9, 2011, event - hosted by CEQ for Federal NEPA and legal staff - speakers promoted the benefits of enhancing transparency and offered practical implementation advice. Ms. Scharf asked the speakers to address why transparency is essential to the NEPA process and describe innovative approaches and achievements. NEPA's value, especially with regard to EISs, is based on transparency,

154

Method for deposition of a conductor in integrated circuits  

DOE Patents [OSTI]

A method is described for fabricating integrated semiconductor circuits and, more particularly, for the selective deposition of a conductor onto a substrate employing a chemical vapor deposition process. By way of example, tungsten can be selectively deposited onto a silicon substrate. At the onset of loss of selectivity of deposition of tungsten onto the silicon substrate, the deposition process is interrupted and unwanted tungsten which has deposited on a mask layer with the silicon substrate can be removed employing a halogen etchant. Thereafter, a plurality of deposition/etch back cycles can be carried out to achieve a predetermined thickness of tungsten.

Creighton, J. Randall (Albuquerque, NM); Dominguez, Frank (Albuquerque, NM); Johnson, A. Wayne (Albuquerque, NM); Omstead, Thomas R. (Albuquerque, NM)

1997-01-01T23:59:59.000Z

155

Multimode circuit QED with hybrid metamaterial transmission lines  

E-Print Network [OSTI]

Quantum transmission lines are a central to superconducting and hybrid quantum computing. Parallel to these developments are those of left-handed meta-materials. They have a wide variety of applications in photonics from the microwave to the visible range such as invisibility cloaks and perfect flat lenses. For classical guided microwaves, left-handed transmission lines have been proposed and studied on the macroscopic scale. We combine these ideas in presenting a left-handed/right-handed hybrid transmission line for applications in quantum optics on a chip. The resulting system allows circuit QED to reach a new regime: multi-mode ultra-strong coupling. Out of the many potential applications of this novel device, we discuss two; the preparation of multipartite entangled states and its use as a quantum simulator for the spin-boson model where a quantum phase transition is reached up to finite size-effects.

Daniel J. Egger; Frank K. Wilhelm

2013-02-22T23:59:59.000Z

156

14 IAEI NEWS July . August 2012 www.iaei.org the conductors  

E-Print Network [OSTI]

14 IAEI NEWS July . August 2012 www.iaei.org the conductors The Conductors, Getting Solar Energy be generating energy for 40­50 years after installation. While power production may not be what it was when conditions of New Mexico for more 30 years without obvious signs of deterioration. PV Cable/PV Wire PV

Johnson, Eric E.

157

Simulation of multiple stability regions in an internally cooled superconducting conductor with the computer code SSICC  

SciTech Connect (OSTI)

The computer code SSICC (Safety and Stability of Internally Cooled Conductors) has successfully simulated the multiple stability regions observed experimentally by Lue, Miller, and Dresner of Oak Ridge National Laboratory. The simulation requires asymmetrical boundary conditions and a heating pulse duration short compared to the time for reflection of the transient pressure wave back into the heated region of the conductor.

Turner, L.R.; Shindler, J.

1984-08-01T23:59:59.000Z

158

Fabrication of the First US ITER TF Conductor Sample for Qualification in SULTAN Facility  

E-Print Network [OSTI]

A pair of 3.5 m long ITER TF size straight conductors has been fabricated into a conductor short sample and submitted to the SULTAN facility at CRPP for cold test. The sample used a triplet-based cabling pattern in one leg ...

Miller, John R.

159

Topology and Design of Wide-Band 3D Metamaterials made of Periodically Loaded Transmission Line Arrays  

E-Print Network [OSTI]

Topology and Design of Wide-Band 3D Metamaterials made of Periodically Loaded Transmission Line index over a wide frequency band. These metamaterials consist of a three- dimensional transmission line and permeability. The cubic-cell transmission line host network is a physical realization of the 3D distributed

Tentzeris, Manos

160

Hyperbolic transmission-line metamaterials Alyona V. Chshelokova, Polina V. Kapitanova, Alexander N. Poddubny, Dmitry S. Filonov, Alexey P.  

E-Print Network [OSTI]

Hyperbolic transmission-line metamaterials Alyona V. Chshelokova, Polina V. Kapitanova, Alexander N by the AIP Publishing Articles you may be interested in Omega transmission lines with applications verification of field rotating with invisibility by full tensor transmission-line metamaterials Appl. Phys

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Comb-shaped single ion conductors based on polyacrylate ethers and lithium  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Comb-shaped single ion conductors based on polyacrylate ethers and lithium Comb-shaped single ion conductors based on polyacrylate ethers and lithium alkyl sulfonate Title Comb-shaped single ion conductors based on polyacrylate ethers and lithium alkyl sulfonate Publication Type Journal Article Year of Publication 2005 Authors Sun, Xiao-Guang, Jun Hou, and John B. Kerr Journal Electrochimica Acta Volume 50 Pagination 1139-1147 Keywords ionic conductivity, plasticizer, polyacrylate ethers, single ion conductor Abstract Comb-shaped single ion conductors have been synthesized by sulfonation of small molecule chloroethyleneglycols, which, after ion exchange to the Li+ salt were then converted to the acrylate by reaction with acryloyl chloride and copolymerized with polyethylene glycol monomethyl ether acrylate (Mn = 454, n = 8) (PAE8-co-E3SO3Li);

162

UCSB researchers uncover fundamental limits on optical transparency...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

are used as transparent contacts in a wide range of optoelectronic devices, such as solar cells, light-emitting diodes, and LCD touch screens. These materials can conduct...

163

Electromagnetically induced transparency controlled by a microwave field  

E-Print Network [OSTI]

interferences in electromagnetically induced transparency. A simple theoretical model and a numerical simulation have been developed to explain the observed experimental results....

Li, Hebin; Sautenkov, Vladimir A.; Rostovtsev, Yuri V.; Welch, George R.; Hemmer, Philip R.; Scully, Marlan O.

2009-01-01T23:59:59.000Z

164

Variable g value of transparent façade collectors  

Science Journals Connector (OSTI)

Transparent solar thermal collectors (TSTC) represent a new development. An adequate model is needed to predict their performance. This paper presents a collector model with an advanced calculation of the transmission of diffuse radiation and a connection to the building which allows analysis of the collector gains and of the g value, also called “solar factor”, “solar heat gain coefficient (SHGC)” or “total solar energy transmittance”. The model is implemented as a TRNSYS Type and a coupled simulation between a collector and a room is presented for different façade constructions. Façade areas with glazing and venetian blinds are simulated with a second new TRNSYS Type which introduces high modelling accuracy for façades with solar control systems. An HVAC system is presented together with a first estimate of possible reductions of primary energy. It indicates primary energy savings of about 30% by replacing opaque walls with transparent collectors. The g values prove to depend not only on the irradiation, but also on the operation of the solar collectors and vary e.g. between 0.04 and 0.21. Detailed modelling of active façades like TSTC is therefore essential for accurate predictions of the collector gain, the heating and cooling loads and the thermal comfort.

Christoph Maurer; Tilmann E. Kuhn

2012-01-01T23:59:59.000Z

165

Wire Making Techniques - HTS Coated Conductors - Fact Sheet  

Broader source: Energy.gov (indexed) [DOE]

Rolling Assisted Biaxially Textured Substrates (RABiTS Rolling Assisted Biaxially Textured Substrates (RABiTS TM ) coated conductors, characterized by their low cost and simple architecture, promise to meet industry price and performance targets. Introduction Since the discovery of high-temperature superconductors (HTS), notably YBa 2 Cu 3 O 7 (YBCO), researchers at the U.S. Department of Energy's (DOE) national laboratories have searched for ways to manufacture affordable flexible wires with high current density. One of the chief obstacles to the manufacture of commercial lengths of YBCO wire has been the phenomenon of weak links, which exist where current crosses a non-superconducting region such as a grain boundary. By aligning grains carefully, low angle boundaries between superconducting grains are assured, which

166

Photoconduction in the Peierls conductor monoclinic TaS$_3$  

E-Print Network [OSTI]

Photoconduction in the monoclinic phase of quasi-one-dimensional conductor TaS$_3$ has been observed at $T quality dependence of both photoconduction and dark conduction at this temperature region has been observed. Together with a similarity of the main features of the photoconduction characteristic of both monoclinic ({\\it m-}TaS$_3$) and orthorhombic ({\\it o-}TaS$_3$) samples the following new peculiarities of photoconduction in {\\it m-}TaS$_3$ were found: 1) the dependence of the activation energy of photoconduction on temperature, $T$, 2) the change of the recombination mechanism from the linear type to the collisional one at low $T$ with a sample quality growth, 3) the existence of a fine structure of the electric-field dependence of photoconduction. Spectral study gives the Peierls energy gap value $2\\Delta ^*= 0.18$~eV.

V. E. Minakova; V. F. Nasretdinova; S. V. Zaitsev-Zotov

2014-11-01T23:59:59.000Z

167

Segmented saddle-shaped passive stabilization conductors for toroidal plasmas  

DOE Patents [OSTI]

A large toroidal vacuum chamber for plasma generation and confinement is lined with a toroidal blanket for shielding using modules segmented in the toroidal direction. To provide passive stabilization in the same manner as a conductive vacuum chamber wall, saddle-shaped conductor loops are provided on blanket modules centered on a midplane of the toroidal chamber with horizontal conductive bars above and below the midplane, and vertical conductive legs on opposite sides of each module to provide return current paths between the upper and lower horizontal conductive bars. The close proximity of the vertical legs provided on adjacent modules without making physical contact cancel the electromagnetic field of adjacent vertical legs. The conductive bars spaced equally above and below the midplane simulate toroidal conductive loops or hoops that are continuous, for vertical stabilization of the plasma even though they are actually segmented. 5 figs.

Leuer, J.A.

1990-05-01T23:59:59.000Z

168

Energy transport faster than light in good conductors and superconductors  

E-Print Network [OSTI]

People need a model to study tachyons whose prediction can be tested easily. The dispersion relation w^2=k^2C^2-a^2C^2 of a low-frequency electromagnetic field in good conductors is equivalent to the energy-momentum equation E^2=p^2C^2-m^2C^4 of a tachyon where the proportionality coefficient is h^2. An experiment in 1980s to measure the phase velocity Vp [1] can be regarded as an indirect evidence of the superluminal velocity V>>c of those photons just equals the rate of energy flow S/w of the field.Instability of the tachyonic field corresponds to the Joule heat. To detect the speed of energy is difficult and we plan to modulate signals to observe the information velocity (speed of points of non-analyticity)[2].

Z. Y. Wang

2011-01-07T23:59:59.000Z

169

Investigation of a Rutherford cable using coated conductor Roebel cables as strands  

Science Journals Connector (OSTI)

Coated conductor applications such as fusion magnets, particle accelerator magnets and generator windings require high current-carrying capabilities. This requirement can be fulfilled by various cable concepts using commercial long length REBCO coated conductors with high current-carrying performance. In the past few years, our group has successfully developed the Roebel cable concept for coated conductors. The design advantages of such a cable are high current-carrying capability and low alternating current (AC) losses. Unfortunately, for large-scale applications, the possibilities of a simple scale-up of the Roebel geometry are limited and additional design ideas are needed. One way to reach the required high currents is the Rutherford cable concept. In this concept a conductor is wound with transposition on a flat metal former. In order to design the former, the bending properties of the Roebel assembled coated conductor cables (RACC) must be measured and characterized. This allows the identification of a destruction-free interval for the Roebel cable, in terms of bending angle and transposition length. In this work we designed and assembled a demonstrator of a coated conductor Rutherford cable (CCRC) with three RACC cables. We measured the critical current and the AC losses of the cable demonstrator. Our results show that, despite still needing efforts in terms of reproducibility of the assembly process and of AC loss reduction, this design is a promising and viable solution for high current-capacity cables made of coated conductors.

A Kario; M Vojenciak; F Grilli; A Kling; B Ringsdorf; U Walschburger; S I Schlachter; W Goldacker

2013-01-01T23:59:59.000Z

170

Reconfigurable anisotropy and functional transformations with VO$_{2}$-based metamaterial electric circuits  

E-Print Network [OSTI]

We demonstrate an innovative multifunctional artificial material that combines exotic metamaterial properties and the environmentally responsive nature of phase change media. The tunable metamaterial is designed with the aid of two interwoven coordinate-transformation equations and implemented with a network of thin film resistors and vanadium dioxide ($VO_{2}$). The strong temperature dependence of $VO_{2}$ electrical conductivity results in a relevant modification of the resistor network behavior, and we provide experimental evidence for a reconfigurable metamaterial electric circuit (MMEC) that not only mimics a continuous medium but is also capable of responding to thermal stimulation through dynamic variation of its spatial anisotropy. Upon external temperature change the overall effective functionality of the material switches between a "truncated-cloak" and "concentrator" for electric currents. Possible applications may include adaptive matching resistor networks, multifunctional electronic devices, an...

Savo, Salvatore; Castaldi, Giuseppe; Moccia, Massimo; Galdi, Vincenzo; Ramanathan, Shriram; Sato, Yuki

2014-01-01T23:59:59.000Z

171

Harnessing fluid-structure interactions to design self-regulating acoustic metamaterials  

SciTech Connect (OSTI)

The design of phononic crystals and acoustic metamaterials with tunable and adaptive wave properties remains one of the outstanding challenges for the development of next generation acoustic devices. We report on the numerical and experimental demonstration of a locally resonant acoustic metamaterial with dispersion characteristics, which autonomously adapt in response to changes of an incident aerodynamic flow. The metamaterial consists of a slender beam featuring a periodic array or airfoil-shaped masses supported by a linear and torsional springs. The resonance characteristics of the airfoils lead to strong attenuation at frequencies defined by the properties of the airfoils and the speed on the incident fluid. The proposed concept expands the ability of existing acoustic bandgap materials to autonomously adapt their dispersion properties through fluid-structure interactions, and has the potential to dramatically impact a variety of applications, such as robotics, civil infrastructures, and defense systems.

Casadei, Filippo [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Bertoldi, Katia [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Kavli Institute for Bionano Science, Harvard University, Cambridge, Massachusetts 02138 (United States)

2014-01-21T23:59:59.000Z

172

Electrically tunable terahertz wave modulator based on complementary metamaterial and graphene  

SciTech Connect (OSTI)

In this paper, we design and numerically demonstrate an electrically controllable light-matter interaction in a hybrid material/metamaterial system consisting of an artificially constructed cross cut-wire complementary metamaterial and an atomically thin graphene layer to realize terahertz (THz) wave modulator. By applying a bias voltage between the metamaterial and the graphene layer, this modulator can dynamically control the amplitude and phase of the transmitted wave near 1.43 THz. Moreover, the distributions of current density show that this large modulation depth can be attributed to the resonant electric field parallel to the graphene sheet. Therefore, the modulator performance indicates the enormous potential of graphene for developing sophisticated THz communication systems.

He, Xun-jun, E-mail: hexunjun@hrbust.edu.cn; Li, Teng-yue; Wang, Lei; Wang, Jian-min; Jiang, Jiu-xing [Department of Electronic Science and technology, School of Applied Sciences, Harbin University of Science and Technology, Harbin 150080 (China); Yang, Guo-hui; Meng, Fan-yi; Wu, Qun [Department of Electronic and Communications Engineering, School of Electronic Information Engineering, Harbin Institute of Technology, Harbin 150001 (China)

2014-05-07T23:59:59.000Z

173

Liquid fuel vaporizer and combustion chamber having an adjustable thermal conductor  

DOE Patents [OSTI]

The efficiency and effectiveness of apparatuses for vaporizing and combusting liquid fuel can be improved using thermal conductors. For example, an apparatus having a liquid fuel vaporizer and a combustion chamber can be characterized by a thermal conductor that conducts heat from the combustion chamber to the vaporizer. The thermal conductor can be a movable member positioned at an insertion depth within the combustion chamber that corresponds to a rate of heat conduction from the combustion chamber to the vaporizer. The rate of heat conduction can, therefore, be adjusted by positioning the movable member at a different insertion depth.

Powell, Michael R; Whyatt, Greg A; Howe, Daniel T; Fountain, Matthew S

2014-03-04T23:59:59.000Z

174

An Electrical Instrument for Detecting Invisible Flaws in Nonmagnetic Conductors Such as Tungsten  

Science Journals Connector (OSTI)

In this instrument the conductor being inspected is passed axially through a coil forming a part of the tuned circuit of an oscillator. Any flaws in the conductor cause a change in the tuning and thus in the frequency generated which is conveniently observed through heterodyning with a fixed frequency. By using high frequency of the order of 6000 kilocycles the response is limited to flaws near the surface of the conductor. This instrument is used in the factory inspection of tungsten wire particularly for the location of longitudinal cracks and is also effective in the determination of asymmetry of coated wires.

D. W. Dana

1934-01-01T23:59:59.000Z

175

Nanopatterned Metallic Films for Use As Transparent Conductive Electrodes in  

E-Print Network [OSTI]

Nanopatterned Metallic Films for Use As Transparent Conductive Electrodes in Optoelectronic Devices metallic films as transparent conductive electrodes in optoelectronic devices. We find that the physics electrodes are critical to the operation of optoelectronic devices. Effective elec- trodes need to combine

Fan, Shanhui

176

Modeling transparency and collaborativeness in distributed work groups  

Science Journals Connector (OSTI)

Transparency and collaborativeness are two essential features required for dependability. These two issues in social groups are not well studied. The present paper studies these two aspects in distributed work group environment such as Self Help Groups ... Keywords: SHG, collaboration, distributed work groups, self help group, transparency

A. B. Sagar

2012-09-01T23:59:59.000Z

177

Gravitational Lensing Characteristics of the Transparent Sun  

E-Print Network [OSTI]

The transparent Sun is modeled as a spherically symmetric and centrally condensed gravitational lens using recent Standard Solar Model (SSM) data. The Sun's minimum focal length is computed to a refined accuracy of 23.5 +/- 0.1 AU, just beyond the orbit of Uranus. The Sun creates a single image of a distant point source visible to observers inside this minimum focal length and to observers sufficiently removed from the line connecting the source through the Sun's center. Regions of space are mapped where three images of a distant point source are created, along with their associated magnifications. Solar caustics, critical curves, and Einstein rings are computed and discussed. Extremely high gravitational lens magnifications exist for observers situated so that an angularly small, unlensed source appears near a three-image caustic. Types of radiations that might undergo significant solar lens magnifications as they can traverse the core of the Sun, including neutrinos and gravitational radiation, are discussed.

Bijunath Patla; Robert J. Nemiroff

2007-11-29T23:59:59.000Z

178

Elevating optical activity: Efficient on-edge lithography of three-dimensional starfish metamaterial  

SciTech Connect (OSTI)

We present an approach for extremely fast, wafer-scale fabrication of chiral starfish metamaterials based on electron beam- and on-edge lithography. A millimeter sized array of both the planar chiral and the true 3D chiral starfish is realized, and their chiroptical performances are compared by circular dichroism measurements. We find optical activity in the visible and near-infrared spectral range, where the 3D starfish clearly outperforms the planar design by almost 2 orders of magnitude, though fabrication efforts are only moderately increased. The presented approach is capable of bridging the gap between high performance optical chiral metamaterials and industrial production by nanoimprint technology.

Dietrich, K., E-mail: dietrich.kay@uni-jena.de; Menzel, C.; Lehr, D.; Puffky, O.; Pertsch, T.; Tünnermann, A.; Kley, E.-B. [Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena (Germany); Hübner, U. [Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena (Germany)

2014-05-12T23:59:59.000Z

179

W-Band Pancharatnam Half Wave Plate Based on Negative Refractive Index Metamaterials  

E-Print Network [OSTI]

Electromagnetic metamaterials, made from arrangements of subwavelength sized structures, can be used to manipulate radiation. Designing metamaterials that have a positive refractive index along one axis and a negative refractive index along the orthogonal axis can result in birefringences, $\\Delta n>1$. The effect can be used to create wave plates with subwavelength thicknesses. Previous attempts at making wave plates in this way have resulted in very narrow usable bandwidths. In this paper, we use the Pancharatnam method to increase the usable bandwidth. A combination of Finite Element Method and Transmission Line models were used to optimise the final design. Experimental results are compared to the modelled data.

Mohamed, Imran; Ng, Ming Wah

2014-01-01T23:59:59.000Z

180

A Nested Approach to REDD+: Structuring Effective and Transparent Incentive  

Open Energy Info (EERE)

A Nested Approach to REDD+: Structuring Effective and Transparent Incentive A Nested Approach to REDD+: Structuring Effective and Transparent Incentive Mechanisms for REDD+ Implementation at Multiple Scales Jump to: navigation, search Tool Summary LAUNCH TOOL Name: A Nested Approach to REDD+: Structuring Effective and Transparent Incentive Mechanisms for REDD+ Implementation at Multiple Scales Agency/Company /Organization: Forest Carbon Portal Sector: Land Focus Area: Forestry Topics: Implementation, Policies/deployment programs Resource Type: Lessons learned/best practices Website: www.forestcarbonportal.com/resource/nested-approach-redd-structuring-e A Nested Approach to REDD+: Structuring Effective and Transparent Incentive Mechanisms for REDD+ Implementation at Multiple Scales Screenshot References: A Nested Approach to REDD+: Structuring Effective and Transparent Incentive Mechanisms for REDD+ Implementation at Multiple Scales[1]

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Recent progress in transparent oxide semiconductors: Materials and device application  

Science Journals Connector (OSTI)

This paper reviews our recent research progress on new transparent conductive oxide (TCO) materials and electronic and optoelectronic devices based on these materials. First, described are the materials including p-type materials, deep-UV transparent TCO(?-Ga2O3), epitaxially grown ITO with atomically flat surface, transparent electrochromic oxide (NbO2F), amorphous TCOs, and nanoporous semiconductor 12CaO · 7Al2O3. Second, presented are TCO-based electronic/optoelectronic devices realized to date, UV/blue LED and UV-sensors based on transparent pn junction and high performance transparent TFT using n-type TCO as an n-channel. Finally, unique optoelectronic properties (p-type degenerate conduction, transfer doping of carriers, RT-stable exciton, and large optical nonlinearity) originating from 2D-electronic nature in p-type layered oxychalcogenides are summarized along with the fabrication method of epitaxial thin films of these materials.

Hideo Hosono

2007-01-01T23:59:59.000Z

182

New Polymeric Proton Conductors for Water-free and High-temperature Fuel Cells  

Broader source: Energy.gov [DOE]

Presentation on New Polymeric Proton Conductors for Water-free and High-temperature Fuel Cells to the High Temperature Membrane Working Group Meeting held in Arlington, Virginia, May 26,2005.

183

Stress-tuned conductor-polymer composite for use in sensors  

DOE Patents [OSTI]

A method for making a composite polymeric material with electrical conductivity determined by stress-tuning of the conductor-polymer composite, and sensors made with the stress-tuned conductor-polymer composite made by this method. Stress tuning is achieved by mixing a miscible liquid into the polymer precursor solution or by absorbing into the precursor solution a soluble compound from vapor in contact with the polymer precursor solution. The conductor may or may not be ordered by application of a magnetic field. The composite is formed by polymerization with the stress-tuning agent in the polymer matrix. The stress-tuning agent is removed following polymerization to produce a conductor-polymer composite with a stress field that depends on the amount of stress-tuning agent employed.

Martin, James E; Read, Douglas H

2013-10-22T23:59:59.000Z

184

Electrothermal Modeling of Coated Conductor for a Resistive Superconducting Fault-Current Limiter  

Science Journals Connector (OSTI)

Coated conductors are very promising for the design of a novel and efficient superconducting fault-current limiter (SFCL). The thermal and electrical behaviors ... of SFCL in the presence of over-critical currents

S. Nemdili; S. Belkhiat

2013-08-01T23:59:59.000Z

185

Health effects of electromagnetic field generated by lightning current pulses near down conductors  

Science Journals Connector (OSTI)

The lightning current generates a time varying magnetic field near down conductors, when lightning strikes the connected Franklin-rod. The down conductors are mounted on the wall of buildings, where residential places can be situated. It is well known that the rapidly changing magnetic fields could generate dangerous eddy currents in the human body. If the duration and the gradient of the magnetic field were high enough, the peripheral nerves are excited. In this study, the authors introduce an improved model of the interaction of electromagnetic fields of lighting current near a down conductor with the human body. The interaction model has two parts: estimation of the magnetic fields surrounding the down conductor and evaluation of health effects of rapid changing magnetic fields on the human body.

Z Á Tamus; B Novák; L Szücs; I Kiss

2011-01-01T23:59:59.000Z

186

E-Print Network 3.0 - al transparent conducting Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Consumer Summary: ISSN 1745-9648 Price Transparency and Consumer Naivety in a Competitive Market by Luke Garrod ESRC... , obfuscation, price transparency Acknowledgements: I am...

187

Data Collection for the Bonneville Power Administration Project on Wind Loading of Transmission Conductors  

Science Journals Connector (OSTI)

ABSTRACT The Bonneville Power Administration (BPA) project, “Wind Effects on Conductors for Span Factors” was established to determine the relationship between actual and theoretical wind loads on overhead transmission conductors. This study aims to improve BPA transmission line design methods and criteria as they relate to wind conditions in the Pacific Northwest. For the past seven years, BPA has collected data from seven sites in the Pacific Northwest. Measurements of wind speeds and directions, ambient temperatures and barometric pressures, and conductor swing angles enable engineers to compare measured wind loads on conductors to theoretical values. Impact of such variables as height of conductor, span lengths and conductor diameter are also investigated. Three sites were instrumented with vertically arranged anemometers to measure wind speed as a function of height above ground. This paper covers site determination, instrumentation, data collection, and some site maintenance and operation challenges. The maintenance and manipulation of the very large data base that has been collected is discussed. As data analysis is not yet finished, final results are not included.

H.W. VOLPE

1987-01-01T23:59:59.000Z

188

Aluminum alloy production for the reinforcement of the CMS conductor  

E-Print Network [OSTI]

The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the Large Hadron Collider (LHC) project at CERN. The design field of the CMS superconducting magnet is 4 T, the magnetic length is 12.5 m and the free bore is 6 m. To reinforce the high-purity (99.998%) Al-stabilized conductor of the magnet against the magnetic loadings experienced during operation at 4.2 K, two continuous sections of Al-alloy (AA) reinforcement are Electron Beam (EB) welded to it. The reinforcements have a section of 24*18 mm and are produced in continuous 2.55 km lengths. The alloy EN AW-6082 has been selected for the reinforcement due to its excellent extrudability, high strength in the precipitation hardened states, high toughness and strength at cryogenic temperature and good EB weldability. Each of the continuous lengths of the reinforcement is extruded billet on billet and press quenched on-line from the extrusion temperature in an industrial extrusion plant. In order to insure the ready EB welda...

Sequeira-Lopes-Tavares, S; Campi, D; Curé, B; Horváth, I L; Riboni, P; Sgobba, Stefano; Smith, R P

2002-01-01T23:59:59.000Z

189

$Nb_{3}Al$ prototype conductor for the transmission line magnet  

E-Print Network [OSTI]

The Very Large Hadron Collider (VLHC), under consideration for construction at Fermilab in the next 1-2 decades, is a 100 TeV cm pp collider. A major cost driver is the magnet. R&D is underway on several possible magnet designs. A low-field (2T) superferric magnet, sometimes called a transmission line magnet, may be the most cost- effective route to the VLHC. Although NbTi is now the cheapest superconductor measured in cost/kA-meter, Nb/sub 3/Al has the potential advantage that it remains superconducting at higher temperature. It may be particularly suited to the single "turn" and long straight lengths of the transmission line design. The combination of the simple magnet design and the higher strain tolerance than e.g. Nb/sub 3/Sn allows a simple process of cable fabrication, reaction, and magnet assembly. This higher strain tolerance is an advantage for splicing in the field. Sumitomo Electric Industries is producing an Nb/sub 3/Al conductor for the Fermilab low-field magnet program. (9 refs).

Barzi, E; Malamud, E; Mazur, P O; Piekarz, H; Wake, M; Hayashi, K; Koganeya, M

1999-01-01T23:59:59.000Z

190

One-way propagation of light in Born-Infeld-like metamaterials  

E-Print Network [OSTI]

We propose and investigate a family of nonlinear metamaterials in which light rays propagate just in one direction -- one-way propagation. Furthermore, we argue how such nonlinear media could provide an analog model for investigating the Born-Infeld Lagrangian in the realm of fields larger than its scale field.

Vitorio A. De Lorenci; Jonas P. Pereira

2014-12-18T23:59:59.000Z

191

Structure-property relations in negative permittivity reststrahlen materials for IR metamaterial applications.  

SciTech Connect (OSTI)

We will present a study of the structure-property relations in Reststrahlen materials that possess a band of negative permittivities in the infrared. It will be shown that sub-micron defects strongly affect the optical response, resulting in significantly diminished permittivities. This work has implications on the use of ionic materials in IR-metamaterials.

Kotula, Paul Gabriel; Rodriguez, Mark Andrew; Shelton, David J. (University of Central Florida); Carroll, James F., III; Boreman, Glenn D. (University of Central Florida); Sinclair, Michael B.; Ihlefeld, Jon F.; Ginn, James Cleveland, III; Clem, Paul Gilbert; Matias, Vladimir (Los Alamos National Laboratory)

2010-09-01T23:59:59.000Z

192

Metamaterial polarization spectral filter: Isolated transmission line at any prescribed wavelength  

E-Print Network [OSTI]

Metamaterial polarization spectral filter: Isolated transmission line at any prescribed wavelength.1063/1.3656286] One of the most elegant polarization spectral filters exhibiting a single isolated transmission line state of light, a high background- and ripple-free transmission line centered at the isoindex point

Zheludev, Nikolay

193

Coherent Control of Nanoscale Light Localization in Metamaterial: Creating and Positioning Isolated Subwavelength Energy Hot Spots  

E-Print Network [OSTI]

in a subwavelength local- ization of optical energy. A desired nanoscale light hot spot can be engineered simplyCoherent Control of Nanoscale Light Localization in Metamaterial: Creating and Positioning Isolated Subwavelength Energy Hot Spots T. S. Kao,1 S. D. Jenkins,2 J. Ruostekoski,2 and N. I. Zheludev1,* 1

Zheludev, Nikolay

194

Resonant coupling to a dipole absorber inside a metamaterial: Anticrossing of the negative index response  

E-Print Network [OSTI]

of New Mexico, 1313 Goddard, Albuquerque, New Mexico 87106 Igal Brener, Michael B. Sinclair, Gregory A, Albuquerque, New Mexico 87185 Received 8 July 2010; accepted 27 September 2010; published 9 November 2010 resonance in the permeability of a fishnet metamaterial and an electric dipole material resonance

New Mexico, University of

195

Anatomy of an transparent optical circulator.  

SciTech Connect (OSTI)

An optical circulator is a multi-port, nonreciprocal device that routes light from one specific port to another. Optical circulators have at least 3 or 4 ports, up to 6 port possible (JDS Uniphase, Huihong Fiber) Circulators do not disregard backward propagating light, but direct it to another port. Optical circulators are commonly found in bi-directional transmission systems, WDM networks, fiber amplifiers, and optical time domain reflectometers (OTDRs). 3-Port optical circulators are commonly used in PDV systems. 1550 nm laser light is launched into Port 1 and will exit out of Port 2 to the target. Doppler-shifted light off the moving surface is reflected back into Port 2 and exits out of Port 3. Surprisingly, a circulator requires a large number of parts to operate efficiently. Transparent circulators offer higher isolation than those of the reflective style using PBSs. A lower PMD is obtained using birefringent crystals rather than PBSs due to the similar path lengths between e and o rays. Many various circulator designs exist, but all achieve the same non-reciprocal results.

Podsednik, Jason W.

2010-09-01T23:59:59.000Z

196

Improving the Transparency of IAEA Safeguards Reporting  

SciTech Connect (OSTI)

In 2008, the Standing Advisory Group on Safeguards Implementation (SAGSI) indicated that the International Atomic Energy Agency's (IAEA) Safeguards Implementation Report (SIR) has not kept pace with the evolution of safeguards and provided the IAEA with a set of recommendations for improvement. The SIR is the primary mechanism for providing an overview of safeguards implementation in a given year and reporting on the annual safeguards findings and conclusions drawn by the Secretariat. As the IAEA transitions to State-level safeguards approaches, SIR reporting must adapt to reflect these evolutionary changes. This evolved report will better reflect the IAEA's transition to a more qualitative and information-driven approach, based upon State-as-a-whole considerations. This paper applies SAGSI's recommendations to the development of multiple models for an evolved SIR and finds that an SIR repurposed as a 'safeguards portal' could significantly enhance information delivery, clarity, and transparency. In addition, this paper finds that the 'portal concept' also appears to have value as a standardized information presentation and analysis platform for use by Country Officers, for continuity of knowledge purposes, and the IAEA Secretariat in the safeguards conclusion process. Accompanying this paper is a fully functional prototype of the 'portal' concept, built using commercial software and IAEA Annual Report data.

Toomey, Christopher; Hayman, Aaron M.; Wyse, Evan T.; Odlaug, Christopher S.

2011-07-17T23:59:59.000Z

197

The Transparent Cost Database (TCDB) | OpenEI Community  

Open Energy Info (EERE)

The Transparent Cost Database (TCDB) The Transparent Cost Database (TCDB) Home > Blogs > Graham7781's blog Graham7781's picture Submitted by Graham7781(2002) Super contributor 2 August, 2012 - 13:30 advanced vehicles electric generation NREL OpenEI renewables tcdb This new web application collects cost and performance estimates and makes it available to everyone to perform analysis. Utilities, policy makers, consumers, and academics can all take advantage of the app that makes electric generation, advanced vehicles, and renewable fuel technologies' performance estimates transparent and open. The Obama Administration has been committed to making data open and transparent. As part, the DOE developed the TCDB through a grant from DOE's Office of Energy Efficiency and Renewable Energy. The platform that hosts

198

Powerpedia - Using Technology to Increase Transparancy | Department of  

Broader source: Energy.gov (indexed) [DOE]

- Using Technology to Increase Transparancy - Using Technology to Increase Transparancy Powerpedia - Using Technology to Increase Transparancy May 18, 2011 - 4:42pm Addthis The OCIO established a Department-wide wiki, Powerpedia, in early 2010 to help facilitate knowledge capture, collaboration, and increased efficiency. Leveraging many of the lessons learned from the intelligence community's Intellipedia effort, the Department implemented Powerpedia to increase the level of transparency and connect people and information together. Built on the same open source software underpinning Wikipedia, called MediaWiki, the Department is rapidly building a large corpus of information that is enabling the organization to "know what it knows". As of May 2011, Powerpedia has over 7,500 total pages and 45,000 page

199

Highly transparent and flexible triboelectric nanogenerators: performance improvements and  

E-Print Network [OSTI]

of mobile electronics and optoelectronic devices. Here, based on the first generation of the transparent and optoelectronic devices.1­4 A suitable energy source is a vital part for realizing fully self-pow- ered systems

Wang, Zhong L.

200

Results From a Transparent Open-Core Downdraft Gasifier  

Science Journals Connector (OSTI)

A transparent quartz reactor has allowed observations on the process of gasification of biomass within an open-core gasifier. This has enabled the individual stages in ... and quantitatively described. Results ac...

J. B. Milligan; G. D. Evans…

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Factors in multinational valuations: Transparency, political risk and diversification  

Science Journals Connector (OSTI)

This paper examines the role of geographic diversification, transparency, and political risk, in the determination of the value of multinational corporations (MNCs). Using alternative measures for geographic diversification, this paper finds the evidence supporting the positive effect of the degree of multinationality on the firm value. The evidence also provides support for the theories that argue that political risk and transparency have negative impact on the MNC value.

NyoNyo A. Kyaw; John Manley; Anand Shetty

2011-01-01T23:59:59.000Z

202

NEPA Success Stories: Celebrating 40 Years of Transparency and Open Government  

Broader source: Energy.gov [DOE]

NEPA Success Stories: Celebrating 40 Years of Transparency and Open Government, Environmental Law Institute, 2010.

203

Nuclear transparency in 90c.m. quasielastic A,,p,2p... reactions  

E-Print Network [OSTI]

Nuclear transparency in 90c.m. ° quasielastic A,,p,2p... reactions J. Aclander,7 J. Alster,7 G Synchrotron of BNL to measure the nuclear transparency of nuclei measured in the A p,2p quasielastic of the energy dependence of the nuclear transparency. In E850 the angular dependence of the nuclear transparency

Christensen, Nelson

204

InGaN-based vertical light-emitting diodes with acid-modified graphene transparent conductor and highly reflective membrane current blocking layer  

Science Journals Connector (OSTI)

...Wang. 2011 Electrical characteristics of vertical light emitting diode with n-type contact on a selectively wet-etching...Measurement of electron overflow in 450 nm InGaN light-emitting diode structures. Appl. Phys. Lett. 94, 061116...

2013-01-01T23:59:59.000Z

205

Measurements of Nb3Sn conductor dimension changes during heat treatment  

SciTech Connect (OSTI)

During the heat treatment of Nb{sub 3}Sn coils the conductor material properties change significantly. These effects together with the changes of the conductor dimensions during heat treatment may introduce large strain in the coils for accelerator magnets. The US LHC Accelerator Research Program (LARP) has initiated a study aiming at understanding the thermal expansion and contraction of Nb3Sn strands, cables and coils during heat treatment. Several measurements on strands and cables were performed in order to have sufficient inputs for finite element simulation of the dimensional changes during heat treatment. In this paper the results of measurements of OST-RRP Nb{sub 3}Sn conductor used in the LARP magnet program are discussed.

Bocian, D.; Ambrosio, G.; Whitson, G.M.; /Fermilab

2011-06-01T23:59:59.000Z

206

Insulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration  

DOE Patents [OSTI]

A heating system for a subsurface formation is described. The heating system includes a first heater, a second heater, and a third heater placed in an opening in the subsurface formation. Each heater includes: an electrical conductor; an insulation layer at least partially surrounding the electrical conductor; and an electrically conductive sheath at least partially surrounding the insulation layer. The electrical conductor is electrically coupled to the sheath at a lower end portion of the heater. The lower end portion is the portion of the heater distal from a surface of the opening. The first heater, the second heater, and the third heater are electrically coupled at the lower end portions of the heaters. The first heater, the second heater, and the third heater are configured to be electrically coupled in a three-phase wye configuration.

Vinegar, Harold J. (Bellaire, TX); Sandberg, Chester Ledlie (Palo Alto, CA)

2010-11-09T23:59:59.000Z

207

Analysis of Conductor Impedances Accounting for Skin Effect and Nonlinear Permeability  

SciTech Connect (OSTI)

It is often necessary to protect sensitive electrical equipment from pulsed electric and magnetic fields. To accomplish this electromagnetic shielding structures similar to Faraday Cages are often implemented. If the equipment is inside a facility that has been reinforced with rebar, the rebar can be used as part of a lighting protection system. Unfortunately, such shields are not perfect and allow electromagnetic fields to be created inside due to discontinuities in the structure, penetrations, and finite conductivity of the shield. In order to perform an analysis of such a structure it is important to first determine the effect of the finite impedance of the conductors used in the shield. In this paper we will discuss the impedances of different cylindrical conductors in the time domain. For a time varying pulse the currents created in the conductor will have different spectral components, which will affect the current density due to skin effects. Many construction materials use iron and different types of steels that have a nonlinear permeability. The nonlinear material can have an effect on the impedance of the conductor depending on the B-H curve. Although closed form solutions exist for the impedances of cylindrical conductors made of linear materials, computational techniques are needed for nonlinear materials. Simulations of such impedances are often technically challenging due to the need for a computational mesh to be able to resolve the skin depths for the different spectral components in the pulse. The results of such simulations in the time domain will be shown and used to determine the impedances of cylindrical conductors for lightning current pulses that have low frequency content.

Perkins, M P; Ong, M M; Brown, C G; Speer, R D

2011-07-20T23:59:59.000Z

208

Plasmonic Light Trapping in an Ultrathin Photovoltaic Layer with Film-Coupled Metamaterial Structures  

E-Print Network [OSTI]

A film-coupled metamaterial structure is numerically investigated for enhancing the light absorption in an ultrathin photovoltaic layer of crystalline gallium arsenide (GaAs). The top subwavelength concave grating and the bottom metallic film could not only effectively trap light with the help of wave interference and magnetic resonance effects excited above the bandgap, but also practically serve as electrical contacts for photon-generated charge collection. The energy absorbed by the active layer is greatly enhanced in the film-coupled metamaterial structure, resulting in significant enhancement on the short-circuit current density by three times over a free-standing GaAs layer at the same thickness. The results would facilitate the development of next-generation ultrathin solar cells with lower cost and higher efficiency.

Wang, Hao

2014-01-01T23:59:59.000Z

209

Broadband Energy Harvesting Using a Metamaterial Resonator Embedded With Non-Foster Impedance Circuitry  

E-Print Network [OSTI]

Radio Frequency Identification (RFID) and implantable biomedical devices need efficient power and data transfer with very low profile antennas. We propose a low profile electrically small antenna for near-field wireless power and data telemetry employing a metamaterial Split Ring Resonator (SRR) antenna. SRRs can be designed for operation over wide frequencies from RF to visible. However, they are inherently narrowband making them sensitive to component mismatch with respect to external transmit antenna. Here we propose an embedding of a non-foster impedance circuitry into the metamaterial SRR structure that imparts conjugate negative complex impedance to this resonator antenna thereby increasing the effective bandwidth and thus overcoming the fundamental limit for efficient signal coupling. We demonstrate the concept through extensive numerical simulations and a prototype system at the board level using discrete off-the-shelf components and printed circuit SRR antenna at 500 MHz. We show that the power trans...

Fu, Guoqing

2014-01-01T23:59:59.000Z

210

Highly-Efficient Selective Metamaterial Absorber for High-Temperature Solar Thermal Energy Harvesting  

E-Print Network [OSTI]

In this work, a metamaterial selective solar absorber made of nanostructured titanium gratings deposited on an ultrathin MgF2 spacer and a tungsten ground film is proposed and experimentally demonstrated. Normal absorptance of the fabricated solar absorber is characterized to be higher than 90% in the UV, visible and, near infrared (IR) regime, while the mid-IR emittance is around 20%. The high broadband absorption in the solar spectrum is realized by the excitation of surface plasmon and magnetic polariton resonances, while the low mid-IR emittance is due to the highly reflective nature of the metallic components. Further directional and polarized reflectance measurements show wide-angle and polarization-insensitive high absorption within solar spectrum. Temperature-dependent spectroscopic characterization indicates that the optical properties barely change at elevated temperatures up to 350{\\deg}C. The solar-to-heat conversion efficiency with the fabricated metamaterial solar absorber is predicted to be 78%...

Wang, Hao; Mitchell, Arnan; Rosengarten, Gary; Phelan, Patrick; Wang, Liping

2014-01-01T23:59:59.000Z

211

Construction of invisibility cloaks of arbitrary shape and size using planar layers of metamaterials  

Science Journals Connector (OSTI)

Transformation optics (TO) is a powerful tool for the design of electromagnetic and optical devices with novel functionality derived from the unusual properties of the transformation media. In general the fabrication of TO media is challenging requiring spatially varying material properties with both anisotropic electric and magnetic responses. Though metamaterials have been proposed as a path for achieving such complex media the required properties arising from the most general transformations remain elusive and cannot implemented by state-of-the-art fabrication techniques. Here we propose faceted approximations of TO media of arbitrary shape in which the volume of the TO device is divided into flat metamaterial layers. These layers can be readily implemented by standard fabrication and stacking techniques. We illustrate our approximation approach for the specific example of a two-dimensional omnidirectional “invisibility cloak ” and quantify its performance using the total scattering cross section as a practical figure of merit.

Oliver Paul; Yaroslav Urzhumov; Christoffer Elsen; David Smith; Marco Rahm

2012-01-01T23:59:59.000Z

212

A proposed measurement of the reverse Cherenkov radiation effect in a metamaterial-loaded circular waveguide  

SciTech Connect (OSTI)

The authors have recently proposed an experiment on verification of the Reverse Cherenkov Radiation (RCR) effect in a Left-Handed-Material-loaded waveguide. Applications of the RCR effect may range from novel higher-order-mode suppressors in microwave and millimeter-wave sources to improved particle detectors for satellite non-proliferation missions. The experimental configuration includes a circular waveguide filled with an artificial metamaterial with simultaneously negative permittivity and permeability, in which the electromagnetic wave with a frequency of 95 GHz will interact with an electron beam. They have demonstrated that for certain values of effective permittivity and permeability only the backward-propagating mode can be exited by the electron beam. At the conference they will present some newly developed metamaterial designs, which they plan to employ for producing the proper effective medium parameters for this experiment.

Shchegolkov, Dmitry [Los Alamos National Laboratory; Azad, Abul K [Los Alamos National Laboratory; O' Hara, John F [Los Alamos National Laboratory; Smirnova, Evgenya I [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

213

Thermal tunability in terahertz metamaterials fabricated on strontium titanate single crystal substrates  

E-Print Network [OSTI]

We report an experimental demonstration of thermal tuning of resonance frequency in a planar terahertz metamaterial consisting of a gold split-ring resonator array fabricated on a bulk single crystal strontium titanate (SrTiO3) substrate. Cooling the metamaterial starting from 409 K down to 150 K causes about 50% shift in resonance frequency as compare to its room temperature resonance, and there is very little variation in resonance strength. The resonance shift is due to the temperature-dependent refractive index (or the dielectric constant) of the strontium titanate. The experiment opens up avenues for designing tunable terahertz devices by exploiting the temperature sensitive characteristic of high dielectric constant substrates and complex metal oxide materials.

Singh, Ranjan; Jia, Q X; Taylor, Antoinette J; Chen, Hou-Tong

2011-01-01T23:59:59.000Z

214

Three-dimensional finite element modeling of a magnet array spinning above a conductor  

SciTech Connect (OSTI)

Drag forces due to eddy currents induced by the relative motion of a conductor and a magnetic field occur in many practical devices: motors, brakes, magnetic bearings, and magnetically levitated vehicles. Recently, finite element codes have included solvers for 3-D eddy current geometries and have the potential to be very useful in the design and analysis of these devices. In this paper, numerical results from three-dimensional modeling of a magnet array spinning above a conductor are compared to experimental results in order to assess the capabilities of these codes.

Lorimer, W.L.; Lieu, D.K. [Univ. of California, Berkeley, CA (United States). Dept. of Mechanical Engineering; Hull, J.R.; Mulcahy, T.M.; Rossing, T.D. [Argonne National Lab., IL (United States)

1993-12-31T23:59:59.000Z

215

Hole-conductor-free perovskite organic lead iodide heterojunction thin-film solar cells: High efficiency and junction property  

E-Print Network [OSTI]

Hole-conductor-free perovskite organic lead iodide heterojunction thin-film solar cells: High-conductor-free organic lead iodide thin film solar cells have been fabricated with a sequential deposition method are comparable to that of the high-efficiency thin-film solar cells. VC 2014 AIP Publishing LLC. [http

Wang, Wei Hua

216

Building Energy Transparency: A Framework for Implementing... Energy Rating  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transparency: A Framework for Implementing... Transparency: A Framework for Implementing... Energy Rating & Disclosure Policy Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers Existing buildings Commercial new construction Industrial energy management Small business Service providers Service and product providers Verify applications for ENERGY STAR certification Design commercial buildings Energy efficiency program administrators Commercial and industrial program sponsors Associations State and local governments Federal agencies Tools and resources Training In This Section Campaigns Commercial building design Communications resources Energy management guidance Financial resources Portfolio Manager Products and purchasing Recognition Research and reports Service and product provider (SPP) resources

217

Microsoft PowerPoint - IPRC_Transparent_Phongikaroon  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experimental Experimental Studies of Oxygen Sparging in Molten Salt Through a Transparent Furnace Experimental Studies of Oxygen Sparging in Molten Salt Through a Transparent Furnace Ryan W. Bezzant and Supathorn Phongikaroon Chemical Engineering Department and Nuclear Engineering Program University of Idaho, Idaho Falls Center for Advanced Energy Studies Michael F. Simpson Pyroprocessing Technology Department, Idaho National Laboratory Ryan W. Bezzant and Supathorn Phongikaroon Chemical Engineering Department and Nuclear Engineering Program University of Idaho, Idaho Falls Center for Advanced Energy Studies Michael F. Simpson Pyroprocessing Technology Department, Idaho National Laboratory Alternative Proposed Processes Chopped Fuel Uranium Metal Metal Waste Ceramic Waste Electrorefiner and Product Refinement Ion Exchange Zone Freezing High Purity Electrolyte High

218

Electromagnetically Induced Transparency from a Single Atom in Free Space  

E-Print Network [OSTI]

We report an absorption spectroscopy experiment and the observation of electromagnetically induced transparency from a single trapped atom. We focus a weak and narrowband Gaussian light beam onto an optically cooled Barium ion using a high numerical aperture lens. Extinction of this beam is observed with measured values of up to 1.3 %. We demonstrate electromagnetically induced transparency of the ion by tuning a strong control beam over a two-photon resonance in a three-level lambda-type system. The probe beam extinction is inhibited by more than 75 % due to population trapping.

L. Slodicka; G. Hetet; S. Gerber; M. Hennrich; R. Blatt

2010-05-18T23:59:59.000Z

219

Mechanically stable, high aspect ratio, multifilar, wound, ribbon-type conductor and method for manufacturing same  

DOE Patents [OSTI]

A mechanically stable, wound, multifilar, ribbon-type conductor having a cross-sectional aspect ratio which may be greater than 12:1, comprising a plurality of conductive strands wound to form a flattened helix containing a plastic strip into which the strands have been pressed so as to form a bond between the strip and the strands. The bond mechanically stabilizes the conductor under tension, preventing it from collapsing into a tubular configuration. In preferred embodiments the plastic strip may be polytetrafluoroethylene, and the conductive strands may be formed from a superconductive material. Conductors in accordance with the present invention may be manufactured by winding a plurality of conductive strands around a hollow mandrel; the cross-section of a hollow mandrel; the cross-section of the mandrel continuously varying from substantially circular to a high aspect ratio elipse while maintaining a constant circumference. The wound conductive strands are drawn from the mandrel as a multifilar helix while simultaneously a plastic strip is fed through the hollow mandrel so that it is contained within the helix as it is withdrawn from the mandrel. The helical conductor is then compressed into a ribbon-like form and the strands are bonded to the plastic strip by a combination of heat and pressure.

Cottingham, James G. (Center Moriches, NY)

1987-01-01T23:59:59.000Z

220

Local Heating in Nanoscale Conductors Yu-Chang Chen, Michael Zwolak, and Massimiliano Di Ventra*  

E-Print Network [OSTI]

Local Heating in Nanoscale Conductors Yu-Chang Chen, Michael Zwolak, and Massimiliano Di Ventra Received October 2, 2003 ABSTRACT We report first-principles calculations of local heating in nanoscale heat dissipation, the single molecule heats less than the gold point contact. We also find that

Zwolak, Michael

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Manufacturing of titanium-bronze processed multifilamentary Nb/sub 3/Sn conductors  

SciTech Connect (OSTI)

It has been revealed that small amount of titanium addition to the bronze matrix is most effective for improving the high-field current-carrying capacities of bronze-processed multifilamentary Nb/sub 3/Sn conductor. Multifilamentary Nb/Cu-7.5at%Sn-0.4at%Ti round wires with 4-5 ..mu..m-diam 31x331-cores fabricated through drawing process only showed the overall critical current density Jc(overall) over 3.5 x 10/sup 4/ A/cm/sup 2/ at 15 T after the heat treatment at 690/sup 0/C for 200 hr. It was also shown that the critical current anisotropy became larger with increasing aspect ratio of the rectangular shaped multifilamentary Nb/Cu-7.5Sn-0.4Ti conductors. Rectangular shaped 5 ..mu..m-diam 31x361-core Nb/Cu-7.5Sn0.45Ti conductors prepared through double extrusions showed about the same tendencies in the aspect ratio dependence of I /SUB c/ (H /SUB II/ ) as those prepared through drawing process only, after the heat treatment at 690/sup 0/C for 200 hr. 9.5 mm wide and 1.8 mm thick Nb/Cu-7.5Sn-0.4Ti conductors with 5 ..mu..m-diam 349x361-cores have been successfully fabricated in full production scale through three steps hydrostatic extrusion process. These rectangular shaped practical multifilamentary Ti bronze Nb/sub 3/Sn conductors make feasible to generate a central magnetic field over 16 T in the 190 mm winding inner diameter intermediate coil of the 18 T superconducting magnet at NRIM.

Kamata, K.; Fujinaga, T.; Itoh, K.; Moriai, H.; Tachikawa, K.; Tada, N.

1985-03-01T23:59:59.000Z

222

Federated Clusters Using the Transparent Remote Execution (TREx) Environment  

E-Print Network [OSTI]

Federated Clusters Using the Transparent Remote Execution (TREx) Environment Richert Wang1 University of California, Irvine 442 Computer Science Building Irvine, CA 92697-3435 rkwang@ics.uci.edu Enrique Cauich University of California, Irvine 442 Computer Science Building Irvine, CA 92697

Scherson, Isaac D.

223

Exploring the Design Space of LUT-based Transparent Accelerators  

E-Print Network [OSTI]

Exploring the Design Space of LUT-based Transparent Accelerators Sami Yehia1 , Nathan Clark2.flautner}@arm.com {ntclark, mahlke}@umich.edu ABSTRACT Instruction set customization accelerates the performance of appli resources. With instruction set customization, specialized accelerators are added to a conventional

Mahlke, Scott A.

224

Avaki Data Grid Secure Transparent Access to Data Andrew Grimshaw  

E-Print Network [OSTI]

1 of 27 Avaki Data Grid ­ Secure Transparent Access to Data Andrew Grimshaw Mike Herrick Anand and development by the Grid community we see Grids (then called Metasystems [3]) being deployed around the world both in academic settings, and more tellingly, in production commercial settings. What is a Grid? What

Grimshaw, Andrew

225

Comparison of gold- and graphene-based resonant nanostructures for terahertz metamaterials and an ultrathin graphene-based modulator  

SciTech Connect (OSTI)

Graphene exhibits unique material properties, and in electromagnetic wave technology it raises the prospect of devices miniaturized down to the atomic length scale. Here we study split-ring resonator metamaterials made from graphene and we compare them to gold-based metamaterials. We find that graphene's huge reactive response derived from its large kinetic inductance allows for deeply subwavelength resonances, although its resonance strength is reduced due to higher dissipative loss damping and smaller dipole coupling. Nevertheless, tightly stacked graphene rings may provide for negative permeability and the electric dipole resonance of graphene meta-atoms turns out to be surprisingly strong. Based on these findings, we present a terahertz modulator based on a metamaterial with a multilayer stack of alternating patterned graphene sheets separated by dielectric spacers. Neighboring graphene flakes are biased against each other, resulting in modulation depths of over 75% at a transmission level of around 90%.

Shen, Nian-Hai [Ames Laboratory; Tassin, Philippe [Ames Laboratory; Koschny, Thomas [Ames Laboratory; Soukoulis, Costas M [Ames Laboratory

2014-09-01T23:59:59.000Z

226

Transparent and Conductive Carbon Nanotube Multilayer Thin Films Suitable as an Indium Tin Oxide Replacement  

E-Print Network [OSTI]

Transparent electrodes made from metal oxides suffer from poor flexibility and durability. Highly transparent and electrically conductive thin films based on carbon nanotubes (CNTs) were assembled as a potential indium tin oxide (ITO) replacement...

Park, Yong Tae

2012-07-16T23:59:59.000Z

227

The Effects of Price Transparency Regulation on Prices in the Healthcare Industry  

E-Print Network [OSTI]

The Effects of Price Transparency Regulation on Prices in the Healthcare Industry Hans B Policymakers have enacted price transparency regulations in over thirty states during the past decade-state variation to address endogeneity concerns, we find that price transparency regulations reduce the price

Mateo, Jill M.

228

Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells  

Science Journals Connector (OSTI)

Silver (Ag) grid transparent electrode is one of the most promising transparent conducting electrodes (TCEs) to replace conventional indium tin oxide (ITO). We systematically...

Lim, Ju Won; Lee, Young Tack; Pandey, Rina; Yoo, Tae-Hee; Sang, Byoung-In; Ju, Byeong-Kwon; Hwang, Do Kyung; Choi, Won Kook

2014-01-01T23:59:59.000Z

229

Joint DOE-PNC research on the use of transparency in support of nuclear nonproliferation  

SciTech Connect (OSTI)

PNC and LANL collaborated in research on the concept of transparency in nuclear nonproliferation. The research was based on the Action Sheet No. 21, which was signed in February 1996, ``The Joint Research on Transparency in Nuclear Nonproliferation`` under the ``Agreement between the Power Reactor and Nuclear Fuel Development Corporation of Japan (PNC) and the US Department of Energy (DOE) for Cooperation in Research and Development Concerning Nuclear Material Control and Accounting Measures for Safeguards and Nonproliferation``. The purpose of Action Sheet 21 is to provide a fundamental study on Transparency to clarify the means to improve worldwide acceptability for the nuclear energy from the nuclear nonproliferation point of view. This project consists of independent research and then joint discussion at workshops that address a series of topics and issues in transparency. The activities covered in Action Sheet 21 took place over a period of 18 months. Three workshops were held; the first and the third hosted by PNC in Tokyo, Japan and the second hosted by LANL in Los Alamos, New Mexico, US. The following is a summary of the three workshops. The first workshop addressed the policy environment of transparency. Each side presented its perspective on the following issues: (1) a definition of transparency, (2) reasons for transparency, (3) detailed goals of transparency and (4) obstacles to transparency. The topic of the second workshop was ``Development of Transparency Options.`` The activities accomplished were (1) identify type of facilities where transparency might be applied, (2) define criteria for applying transparency, and (3) delineate applicable transparency options. The goal of the third workshop, ``Technical Options for Transparency,`` was to (1) identify conceptual options for transparency system design; (2) identify instrumentation, measurement, data collection and data processing options; (3) identify data display options; and (4) identify technical options for reprocessing, enrichment, and MOX fuel fabrication facilities.

Mochiji, Toshiro; Keeney, R.; Tazaki, Makiko [Power Reactor and Nuclear Fuel Development Corp. (Japan). Office of Nuclear Nonproliferation; Nakhleh, C.; Puckett, J.; Stanbro, W. [Los Alamos National Lab., NM (United States). Safeguards System Group

1999-01-01T23:59:59.000Z

230

Plasma-Assisted Reduction of Graphene Oxide at Low Temperature and Atmospheric Pressure for Flexible Conductor Applications  

Science Journals Connector (OSTI)

Plasma-Assisted Reduction of Graphene Oxide at Low Temperature and Atmospheric Pressure for Flexible Conductor Applications ... The method allows rapid deoxygenation of bulk graphite oxide (GO) in an atmosphere of ... ...

Seung Whan Lee; Cecilia Mattevi; Manish Chhowalla; R. Mohan Sankaran

2012-02-22T23:59:59.000Z

231

Diffraction-free optical beam propagation with near-zero phase variation in extremely anisotropic metamaterials  

E-Print Network [OSTI]

Extremely anisotropic metal-dielectric multilayer metamaterials are designed to have the effective permittivity tensor of a transverse component (parallel to the interfaces of the multilayer) with zero real part and a longitudinal component (normal to the interfaces of the multilayer) with ultra-large imaginary part at the same wavelength, including the optical nonlocality analysis based on the transfer-matrix method. The diffraction-free deep-subwavelength optical beam propagation with near-zero phase variation in the designed multilayer stack due to the near-flat iso-frequency contour is demonstrated and analyzed, including the effects of the multilayer period and the material loss.

Sun, Lei; Wang, Wei; Gao, Jie

2015-01-01T23:59:59.000Z

232

Nonlinear interaction of two trapped-mode resonances in a bilayer "fish-scale" metamaterial  

E-Print Network [OSTI]

We report on a bistable light transmission through a bilayer "fish-scale" (meander-line) metamaterial. It is demonstrated that an all-optical switching may be achieved nearly the frequency of the high-quality-factor Fano-shaped trapped-mode resonance excitation. The nonlinear interaction of two closely spaced trapped-mode resonances in the bilayer structure composed with a Kerr-type nonlinear dielectric slab is analyzed in both frequency and time domains. It is demonstrated that these two resonances react differently on the applied intense light which leads to destination of a multistable transmission.

Tuz, Vladimir R; Mladyonov, Pavel L; Prosvirnin, Sergey L; Novitsky, Andrey V

2014-01-01T23:59:59.000Z

233

Designing a square invisibility cloak using metamaterials made of stacked positive-negative index slabs  

Science Journals Connector (OSTI)

We present a design of a square invisibility cloak based on triangular transformations. In triangular transformations certain areas of the cloak are squeezed to be infinitesimal in the virtual space. This results in cloak materials whose constitutive parameters are singular. We show rigorously that these prescribed singular materials can be emulated by metamaterials made of stacked positive-negative index slabs. We use numerical simulations to demonstrate the conceived square cloak which in principle can be constructed using only homogenous and non-singular materials. The proposed square invisibility cloak suggests another important application of negative index media.

Guanghao Zhu

2013-01-01T23:59:59.000Z

234

Near-field thermal radiation between hyperbolic metamaterials: Graphite and carbon nanotubes  

SciTech Connect (OSTI)

The near-field radiative heat transfer for two hyperbolic metamaterials, namely, graphite and vertically aligned carbon nanotubes (CNTs), is investigated. Graphite is a naturally existing uniaxial medium, while CNT arrays can be modeled as an effective anisotropic medium. Different hyperbolic modes can be separately supported by these materials in certain infrared regions, resulting in a strong enhancement in near-field heat transfer. It is predicted that the heat flux between two CNT arrays can exceed that between SiC plates at any vacuum gap distance and is about 10 times higher with a 10?nm gap.

Liu, X. L.; Zhang, R. Z.; Zhang, Z. M., E-mail: zhuomin.zhang@me.gatech.edu [G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

2013-11-18T23:59:59.000Z

235

Transparent Prices for Municipal Water: Impact of Pricing and Billing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transparent Prices for Municipal Water: Impact of Pricing and Billing Transparent Prices for Municipal Water: Impact of Pricing and Billing Practices on Residential Water Use Speaker(s): Sylvestre Gaudin Date: November 29, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: John Busch Jr. Economic Research shows overwhelmingly that residential consumers do not pay much attention to price changes when they make decisions about water use. This weak price sensitivity is often attributed to the intrinsic nature of water as a necessity. However, a large part of water use is the result of choices that could easily be altered without affecting basic welfare. Economic theory points to at least two other reasons why consumers would not be responsive to price changes for water use: the fact that water bills constitute a small portion of their budgets, and the fact that price

236

Compound transparent ceramics and methods of preparation thereof  

DOE Patents [OSTI]

According to one embodiment, a method for forming a composite transparent ceramic preform includes forming a first suspension of oxide particles in a first solvent which includes a first dispersant but does not include a gelling agent, adding the first suspension to a first mold of a desired shape, and uniformly curing the first suspension in the first mold until stable. The method also includes forming a second suspension of oxide particles in a second solvent which includes a second dispersant but does not include a gelling agent, adding the second suspension to the stable first suspension in a second mold of a desired shape encompassing the first suspension and the second suspension, and uniformly curing the second suspension in the second mold until stable. Other methods for forming a composite transparent ceramic preform are also described according to several other embodiments. Structures are also disclosed.

Hollingsworth, Joel P.; Kuntz, Joshua D.; Soules, Thomas F.; Landingham, Richard L.

2012-12-11T23:59:59.000Z

237

Transparent runtime parallelization of the R scripting language  

SciTech Connect (OSTI)

Scripting languages such as R and Matlab are widely used in scientific data processing. As the data volume and the complexity of analysis tasks both grow, sequential data processing using these tools often becomes the bottleneck in scientific workflows. We describe pR, a runtime framework for automatic and transparent parallelization of the popular R language used in statistical computing. Recognizing scripting languages interpreted nature and data analysis codes use pattern, we propose several novel techniques: (1) applying parallelizing compiler technology to runtime, whole-program dependence analysis of scripting languages, (2) incremental code analysis assisted with evaluation results, and (3) runtime parallelization of file accesses. Our framework does not require any modification to either the source code or the underlying R implementation. Experimental results demonstrate that pR can exploit both task and data parallelism transparently and overall has better performance as well as scalability compared to an existing parallel R package that requires code modification.

Yoginath, Srikanth B [ORNL

2011-01-01T23:59:59.000Z

238

Microsoft Word - CX-Monroe-Snohomish-ExpandedConductorReplacement_FY13_WEB.doc  

Broader source: Energy.gov (indexed) [DOE]

June 13, 2013 June 13, 2013 REPLY TO ATTN OF: KEPR-Covington SUBJECT: Environmental Clearance Memorandum Frank Weintraub Mechanical Engineer - TEP-TPP-1 Proposed Action: Replacement of expanded conductor from Bonneville Power Administration's (BPA) Monroe Substation to structure 2/1 on the Monroe-Snohomish transmission line PP&A Project No.: 2682 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions/ modifications to transmission facilities Location: Snohomish County, Washingto.n, in BPA's Snohomish District Proposed by: BPA Description of the Proposed Action: BPA proposes to replace 2.5 inch expanded conductor from Monroe Substation to structure 2/1 on the Monroe-Snohomish 230-kilovolt transmission

239

Microsoft Word - Poster Abstract_2010_GATech_Mixed Ionic-Electronic Conductors.docx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Investigation of Oxygen Reduction Activity on Mixed Ionic-Electronic Conductors for Investigation of Oxygen Reduction Activity on Mixed Ionic-Electronic Conductors for SOFC Cathodes Matthew E. Lynch, Lei Yang, Meilin Liu Center for Innovative Fuel Cell and Battery Technologies School of Materials Science and Engineering Georgia Institute of Technology 771 Ferst Dr., Atlanta, GA 30332-0245 Telephone: 404-894-6114 Email: meilin.liu@mse.gatech.edu Porous cathodes are of primary importance to the electrochemical operation of a solid oxide fuel cell (SOFC). The compound La 1-x Sr x Co 1-y Fe y O 3-δ (LSCF) is a candidate material for the cathode, and shows good mixed ionic-electronic conductivity as well as good activity toward the oxygen reduction

240

Microsoft Word - CX-BigEddy-Redmond-ConductorMaintenance-FY13_WEB  

Broader source: Energy.gov (indexed) [DOE]

4, 2013 4, 2013 REPLY TO ATTN OF: KEP-4 SUBJECT: Environmental Clearance Memorandum Stacy Hensley Project Manager - TEP-CSB-2 Proposed Action: Conductor maintenance on Bonneville Power Administration's (BPA) Big Eddy-Redmond transmission line Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.3 Routine maintenance activities Location: Approximately six miles southeast of The Dalles in Wasco County, Oregon. T1N, R14E, Sec 4, 5, 9, 20, 28, 29, and 33 Proposed by: BPA Description of the Proposed Action: BPA proposes to perform routine maintenance on the Big Eddy-Redmond, 230-kilovolt transmission line conductor. The proposed work includes re-sagging the transmission line, and replacing the transmission line hardware and transmission

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Calculation of electric field and audible noise from transmission lines with non-parallel conductors  

SciTech Connect (OSTI)

In order to investigate the feasibility of using new transmission line configurations with non-parallel conductors, for managing magnetic field in critical areas, techniques are needed to assess the effects of different three-dimensional line arrangements on other important design parameters. A new method for calculation of electric field and corona-generated audible noise from non-parallel conductors is described and implemented as a computer tool. This method uses linearly varying line charges to simulate charge distribution along the axial direction of the transmission line. New algorithms are developed for calculating electric field and audible noise due to non-uniform line charges and illustrated by examples of low magnetic field transmission line designs.

Liu, Y. [Virginia Tech, Blacksburg, VA (United States)] [Virginia Tech, Blacksburg, VA (United States); Zaffanella, L.E. [Enertech Consultants, Lee, MA (United States)] [Enertech Consultants, Lee, MA (United States)

1996-07-01T23:59:59.000Z

242

Development of bending characteristics for the TPX TF magnet coil cable-in-conduit conductor  

SciTech Connect (OSTI)

The conductor for the toroidal field (TF) magnet coils for the Tokamak Physics experiment (TPX) is an assembly of stranded Nb{sub 3}Sn superconductor sheathed by an Incoloy 908 conduit. The coil shape, when coupled with stiffness of the cable-in-conduit conductor (CICC) is such that conventional magnet winding techniques cannot be utilized. Therefore a bending and forming method will be employed in the TF coils. The cable will be reacted after bending because the reaction process hardens the conduit and also lowers the strain the cable can withstand without performance degradation. The Incoloy 908 conduit also work hardens quickly, necessitating the production of the required coil shape in one step without correction. This paper discusses the limiting processes for forming the TPX TF magnet geometry, the methods utilized in establishing the CICC bending characteristics and the methods employed to account for material springback so that a coil can be manufactured accurately and efficiently.

Grut, K.E.; Holbrook, R.L.; Hook, E.; Antaya, T.A. [Babcock and Wilcox, Lynchburg, VA (United States)

1996-12-31T23:59:59.000Z

243

Evaluation of a cryostable low-loss conductor for pulsed field applications  

SciTech Connect (OSTI)

A cryostable, low loss conductor as the basic strand in a 50 kA cable for a 20 MJ prototype, tokamak induction heating coil has been developed, fabricated, and evaluated. The conductor has a copper matrix multifilamentary NbTi core surrounded by a CuNi ring and stabilizing copper segmented by radial CuNi fins. Pulsed loss measurements have been made up to 2.2 T and for decay times from 0.7 to 278 ms. Measurements made on samples with various twists and portions etched away have allowed accurate evaluation of the loss components. Stability measurements were also made on insulated and uninsulated single strands and on subcables. Measured recovery heat flux for the bare strand is about 0.3 W/cm/sup 2/; however, the application of a 0.0005 in. layer of Omega insulation increases the value to about 0.5 W/cm/sup 2/.

Wollan, J.J.; Walker, M.S.; Zeitlin, B.A.; Pollack, D.A.; Shen, S.S.

1980-01-01T23:59:59.000Z

244

Low AC Loss YBCO Coated Conductor Geometry by Direct Inkjet Printing  

SciTech Connect (OSTI)

The second generation (2G) high temperature superconductors (HTS) wire offers potential benefits for many electric power applications, including ones requiring filamentized conductors with low ac loss, such as transformers and fault current limiters. However, the use of 2G wire in these applications requires the development of both novel multi-filamentary conductor designs with lower ac losses and the development of advanced manufacturing technologies that enable the low-cost manufacturing of these filamentized architectures. This Phase I SBIR project focused on testing inkjet printing as a potential low-cost, roll-to-roll manufacturing technique to fabricate potential low ac loss filamentized architectures directly on the 2G template strips.

Rupich, Martin, Dr. [American Superconductor Corporation; Duckworth, Robert, Dr. [Oak Ridge National Laboratory

2009-10-01T23:59:59.000Z

245

Particle trap to sheath non-binding contact for a gas-insulated transmission line having a corrugated outer conductor  

DOE Patents [OSTI]

A non-binding particle trap to outer sheath contact for use in gas insulated transmission lines having a corrugated outer conductor. The non-binding feature of the contact according to the teachings of the invention is accomplished by having a lever arm rotatably attached to a particle trap by a pivot support axis disposed parallel to the direction of travel of the inner conductor/insulator/particle trap assembly.

Fischer, William H. (Pittsburgh, PA)

1984-04-24T23:59:59.000Z

246

Three Successful Tests of Color Transparency and Nuclear Filtering  

E-Print Network [OSTI]

We review the theoretical formalism for hard exclusive processes in a nuclear medium. Theory suggests that these processes will show the very interesting phenomena of color transparency and nuclear filtering. The survival probability in nuclear media has also been predicted to show a scaling behavior at large momentum and large nuclear number. We show that all of these effects may have already been seen experimentally.

Pankaj Jain; John P. Ralston

1993-10-06T23:59:59.000Z

247

Prevention of covered conductor burndown on distribution circuits - arcing protection devices  

SciTech Connect (OSTI)

The mechanism of covered conductor burndown is discussed in light of experience by the Pennsylvania Power and Light Company (PPandL) on 12-kV distribution circuits. A summary of laboratory test results is given to allow extension of this work to other distribution circuits. Details and early field experience are included on the Arcing Protection Device (APD), selected in an earlier study/sup 1/ as the superior burndown prevention technique.

Lee, R.E. (Pennsylvania Power and Light Co., Allentown, PA); Fritz, D.; Shankle, D.; Stiller, P.

1982-08-01T23:59:59.000Z

248

Effects of electron-electron and electron-phonon interactions in weakly disordered conductors and heterostructures  

Science Journals Connector (OSTI)

We investigate quantum corrections to the conductivity due to the interference of electron-electron (electron-phonon) scattering and elastic electron scattering from impurities and defects in weakly disordered conductors. The interference corrections are proportional to the Drude conductivity and have various temperature dependences. The electron-electron interaction results in a T2 ln T correction in bulk conductors. In a quasi-two-dimensional (quasi-2D) conductor, d1) this correction is linear in temperature and differs from that for 2D electrons [G. Zala et al., Phys. Rev. B 64, 214204 (2001)] by a numerical factor. In quasi-one-dimensional conductors with 3D and 2D electron spectra (a wire with radius r

A. Sergeev; M. Yu. Reizer; V. Mitin

2004-02-18T23:59:59.000Z

249

FEMCAM Analysis of SULTAN Test Results for ITER Nb3SN Cable-conduit Conductors  

SciTech Connect (OSTI)

Performance degradation due to filament fracture of Nb3 Sn cable-in-conduit conductors (CICCs) is a critical issue in large-scale magnet designs such as ITER which is currently being constructed in the South of France. The critical current observed in most SULTAN TF CICC samples is significantly lower than expected and the voltage-current characteristic is seen to have a much broader transition from a single strand to the CICC. Moreover, most conductors exhibit the irreversible degradation due to filament fracture and strain relaxation under electromagnetic cyclic loading. With recent success in monitoring thermal strain distribution and its evolution under the electromagnetic cyclic loading from in situ measurement of critical temperature, we apply FEMCAM which includes strand filament breakage and local current sharing effects to SULTAN tested CICCs to study Nb3 Sn strain sensitivity and irreversible performance degradation. FEMCAM combines the thermal bending effect during cool down and the EM bending effect due to locally accumulating Lorentz force during magnet operation. It also includes strand filament fracture and related local current sharing for the calculation of cable n value. In this paper, we model continuous performance degradation under EM cyclic loading based on strain relaxation and the transition broadening upon cyclic loading to the extreme cases seen in SULTAN test data to better quantify conductor performance degradation.

Yuhu Zhai, Pierluigi Bruzzone, Ciro Calzolaio

2013-03-19T23:59:59.000Z

250

Near-infrared double negative metamaterials Shuang Zhang, Wenjun Fan, K. J. Malloy and S. R. J. Brueck  

E-Print Network [OSTI]

Near-infrared double negative metamaterials Shuang Zhang, Wenjun Fan, K. J. Malloy and S. R. J and negative over an overlapping near-infrared wavelength range resulting in a low loss negative. Brueck, "Demonstration of Near-Infrared Negative-Index Materials," Postdeadline Paper at OSA Topical

New Mexico, University of

251

Development of a nuclear fuel cycle transparency framework.  

SciTech Connect (OSTI)

Nuclear fuel cycle transparency can be defined as a confidence building approach among political entities to ensure civilian nuclear facilities are not being used for the development of nuclear weapons. Transparency concepts facilitate the transfer of nuclear technology, as the current international political climate indicates a need for increased methods of assuring non-proliferation. This research develops a system which will augment current non-proliferation assessment activities undertaken by U.S. and international regulatory agencies. It will support the export of nuclear technologies, as well as the design and construction of Gen. IV energy systems. Additionally, the framework developed by this research will provide feedback to cooperating parties, thus ensuring full transparency of a nuclear fuel cycle. As fuel handling activities become increasingly automated, proliferation or diversion potential of nuclear material still needs to be assessed. However, with increased automation, there exists a vast amount of process data to be monitored. By designing a system that monitors process data continuously, and compares this data to declared process information and plant designs, a faster and more efficient assessment of proliferation risk can be made. Figure 1 provides an illustration of the transparency framework that has been developed. As shown in the figure, real-time process data is collected at the fuel cycle facility; a reactor, a fabrication plant, or a recycle facility, etc. Data is sent to the monitoring organization and is assessed for proliferation risk. Analysis and recommendations are made to cooperating parties, and feedback is provided to the facility. The analysis of proliferation risk is based on the following factors: (1) Material attractiveness: the quantification of factors relevant to the proliferation risk of a certain material (e.g., highly enriched Pu-239 is more attractive than that of lower enrichment) (2) The static (baseline) risk: the quantification of risk factors regarding the expected value of proliferation risk under normal (not proliferating) operations. (3) The dynamic (changing) risk: the quantification of risk factors regarding the observed value of proliferation risk, based on monitor signals from facility operations. This framework could be implemented at facilities which have been exported (for instance, to third world countries), or facilities located in sensitive countries. Sandia National Laboratories is currently working with the Japan Nuclear Cycle Development Institute (JNC) to implement a demonstration of nuclear fuel cycle transparency technology at the Fuel Handling Training Model designed for the Monju Fast Reactor at the International Cooperation and Development Training Center in Japan. This technology has broad applications, both in the U.S. and abroad. Following the demonstration, we expect to begin further testing of the technology at an Enrichment Facility, a Fast Reactor, and at a Recycle Facility.

Love, Tracia L.

2005-04-01T23:59:59.000Z

252

Multiple-band reflective polarization converter using U-shaped metamaterial  

SciTech Connect (OSTI)

A multiple-band metamaterial reflective polarization converter (RPC) is proposed, which is composed of the dielectric substrate sandwiched with U-shaped metallic patterns and continuous metal film. The proposed U-shaped metamaterial RPC (UMM-RPC) can convert a linearly polarized wave to its cross polarized wave at the three resonant frequencies, which also can convert the linearly polarized wave to circularly polarized wave at other three resonant frequencies. Furthermore, the proposed UMM-RPC can maintain the same conversional direction at the three resonant frequencies when incident on a circularly polarized wave. The simulated and measured results are in agreement in the entire frequency range, and the polarization conversion ratio is over 90% for both linear and circular polarizations. The surface current distributions of the UMM-RPC are discussed to look into the physical mechanism. The proposed UMM-RPC has simple geometry but more operating frequency bands compared to the previous designs and can be used in applications such as antenna radome, remote sensors, and radiometer.

Huang, Xiaojun [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China); Department of Physics, Kashgar Teachers College, Kashgar 844000 (China); Yang, Dong [College of Physics and Electronics Science, Hubei Normal University, Huangshi 435002 (China); Yang, Helin, E-mail: emyang@mail.ccnu.edu.cn [College of Physical Science and Technology, Central China Normal University, Wuhan 430079 (China)

2014-03-14T23:59:59.000Z

253

Interactive behavior of internal resonators in acoustic metamaterials under impact pulse loading  

Science Journals Connector (OSTI)

Acoustic metamaterials exhibit negative effective mass density when the lattice system consists of mass-in-mass microstructural units. It is found out that the effective mass density becomes frequency dependent and displays negativity for frequencies near the resonant frequency of the internal resonators. The effect of a negative mass property implies that stress wave propagation is prohibited; leading to structural applications like vibration control impact protection and shock wave mitigation. Under impact loading internal resonators are revealed to effectively reduce the displacement/velocity of the overall structure and attenuate a specifically-designed range of frequency where the negative effective mass density is exhibited. However researchers have yet to study the mutual interaction between the internal resonators. Knowing how adjacent resonators interact and response to dynamic profile of preceding resonators may lead to more efficient design for stress wave attenuation. In this paper we performed detailed investigation on the interactive behavior of internal resonators in acoustic metamaterials under an impact pulse load. Finite element analysis results show that when internal resonators are adjacently placed they produce a coupled resonance effect resulting in a leakage of frequency just below the resonant frequency of the resonators. This frequency leakage can lead to energy storage and harvesting applications.

Kwek Tze Tan

2013-01-01T23:59:59.000Z

254

Interactive behavior of internal resonators in acoustic metamaterials under impact pulse loading  

Science Journals Connector (OSTI)

Acoustic metamaterials exhibit negative effective mass density when the lattice system consists of mass-in-mass microstructural units. It is found out that the effective mass density becomes frequency dependent and displays negativity for frequencies near the resonant frequency of the internal resonators. The effect of a negative mass property implies that stress wave propagation is prohibited; leading to structural applications like vibration control impact protection and shock wave mitigation. Under impact loading internal resonators are revealed to effectively reduce the displacement/velocity of the overall structure and attenuate a specifically designed range of frequency where the negative effective mass density is exhibited. However researchers have yet to study the mutual interaction between the internal resonators. Knowing how adjacent resonators interact and response to dynamic profile of preceding resonators may lead to more efficient design for stress wave attenuation. In this paper we performed detailed investigation on the interactive behavior of internal resonators in acoustic metamaterials under an impact pulse load. Finite element analysis results show that when internal resonators are adjacently placed they produce a coupled resonance effect resulting in a leakage of frequency just below the resonant frequency of the resonators. This frequency leakage can lead to energy storage and harvesting applications.

Kwek Tze Tan

2013-01-01T23:59:59.000Z

255

A framework and methodology for nuclear fuel cycle transparency.  

SciTech Connect (OSTI)

A key objective to the global deployment of nuclear technology is maintaining transparency among nation-states and international communities. By providing an environment in which to exchange scientific and technological information regarding nuclear technology, the safe and legitimate use of nuclear material and technology can be assured. Many nations are considering closed or multiple-application nuclear fuel cycles and are subsequently developing advanced reactors in an effort to obtain some degree of energy self-sufficiency. Proliferation resistance features that prevent theft or diversion of nuclear material and reduce the likelihood of diversion from the civilian nuclear power fuel cycle are critical for a global nuclear future. IAEA Safeguards have been effective in minimizing opportunities for diversion; however, recent changes in the global political climate suggest implementation of additional technology and methods to ensure the prompt detection of proliferation. For a variety of reasons, nuclear facilities are becoming increasingly automated and will require minimum manual operation. This trend provides an opportunity to utilize the abundance of process information for monitoring proliferation risk, especially in future facilities. A framework that monitors process information continuously can lead to greater transparency of nuclear fuel cycle activities and can demonstrate the ability to resist proliferation associated with these activities. Additionally, a framework designed to monitor processes will ensure the legitimate use of nuclear material. This report describes recent efforts to develop a methodology capable of assessing proliferation risk in support of overall plant transparency. The framework may be tested at the candidate site located in Japan: the Fuel Handling Training Model designed for the Monju Fast Reactor at the International Cooperation and Development Training Center of the Japan Atomic Energy Agency.

McClellan, Yvonne; York, David L.; Inoue, Naoko (Japan Atomic Energy Agency, Ibaraki, Japan); Love, Tracia L.; Rochau, Gary Eugene

2006-02-01T23:59:59.000Z

256

First Principles Study of the Li[subscript 10]GeP[subscript 2]S[subscript 12] Lithium Super Ionic Conductor Material  

E-Print Network [OSTI]

The continued drive for high performance lithium batteries has imposed stricter requirements on the electrolyte materials. Solid electrolytes comprising lithium super ionic conductor materials exhibit good safety and ...

Mo, Yifei

257

Rapid process for producing transparent, monolithic porous glass  

DOE Patents [OSTI]

A process for making transparent porous glass monoliths from gels. The glass is produced much faster and in much larger sizes than present technology for making porous glass. The process reduces the cost of making large porous glass monoliths because: 1) the process does not require solvent exchange nor additives to the gel to increase the drying rates, 2) only moderate temperatures and pressures are used so relatively inexpensive equipment is needed, an 3) net-shape glass monoliths are possible using this process. The process depends on the use of temperature to control the partial pressure of the gel solvent in a closed vessel, resulting in controlled shrinking during drying.

Coronado, Paul R. (Livermore, CA)

2006-02-14T23:59:59.000Z

258

Radio-transparent multi-layer insulation for radiowave receivers  

SciTech Connect (OSTI)

In the field of radiowave detection, enlarging the receiver aperture to enhance the amount of light detected is essential for greater scientific achievements. One challenge in using radio transmittable apertures is keeping the detectors cool. This is because transparency to thermal radiation above the radio frequency range increases the thermal load. In shielding from thermal radiation, a general strategy is to install thermal filters in the light path between aperture and detectors. However, there is difficulty in fabricating metal mesh filters of large diameters. It is also difficult to maintain large diameter absorptive-type filters in cold because of their limited thermal conductance. A technology that maintains cold conditions while allowing larger apertures has been long-awaited. We propose radio-transparent multi-layer insulation (RT-MLI) composed from a set of stacked insulating layers. The insulator is transparent to radio frequencies, but not transparent to infrared radiation. The basic idea for cooling is similar to conventional multi-layer insulation. It leads to a reduction in thermal radiation while maintaining a uniform surface temperature. The advantage of this technique over other filter types is that no thermal links are required. As insulator material, we used foamed polystyrene; its low index of refraction makes an anti-reflection coating unnecessary. We measured the basic performance of RT-MLI to confirm that thermal loads are lowered with more layers. We also confirmed that our RT-MLI has high transmittance to radiowaves, but blocks infrared radiation. For example, RT-MLI with 12 layers has a transmittance greater than 95% (lower than 1%) below 200 GHz (above 4 THz). We demonstrated its effects in a system with absorptive-type filters, where aperture diameters were 200 mm. Low temperatures were successfully maintained for the filters. We conclude that this technology significantly enhances the cooling of radiowave receivers, and is particularly suitable for large-aperture systems. This technology is expected to be applicable to various fields, including radio astronomy, geo-environmental assessment, and radar systems.

Choi, J. [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of)] [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of); Ishitsuka, H. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan)] [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Mima, S. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)] [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Oguri, S., E-mail: shugo@post.kek.jp [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan); Takahashi, K. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan) [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Department of Physics, Tohoku University, Sendai, Miyagi 980-8578 (Japan); Tajima, O. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan) [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2013-11-15T23:59:59.000Z

259

Electromagnetically induced transparency in mechanical effects of light  

SciTech Connect (OSTI)

We consider the dynamical behavior of a nanomechanical mirror in a high-quality cavity under the action of a coupling laser and a probe laser. We demonstrate the existence of the analog of electromagnetically induced transparency (EIT) in the output field at the probe frequency. Our calculations show explicitly the origin of EIT-like dips as well as the characteristic changes in dispersion from anomalous to normal in the range where EIT dips occur. Remarkably the pump-probe response for the optomechanical system shares all the features of the {Lambda} system as discovered by Harris and collaborators.

Agarwal, G. S.; Huang, Sumei [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

2010-04-15T23:59:59.000Z

260

Electromagnetically induced transparency with quantized fields in optocavity mechanics  

SciTech Connect (OSTI)

We report electromagnetically induced transparency (EIT) using quantized fields in optomechanical systems. The weak probe field is a narrowband squeezed field. We present a homodyne detection of EIT in the output quantum field. We find that the EIT dip exists even though the photon number in the squeezed vacuum is at the single-photon level. The EIT with quantized fields can be seen even at temperatures on the order of 100 mK, thus paving the way for using optomechanical systems as memory elements.

Huang Sumei; Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Spectroscopy of strontium Rydberg states using electromagnetically induced transparency  

E-Print Network [OSTI]

We report on the all-optical detection of Rydberg states in a effusive atomic beam of strontium atoms using electromagnetically induced transparency (EIT). Using narrow-linewidth CW lasers we obtain an EIT linewidth of 5 MHz. To illustrate the high spectroscopic resolution offered by this method, we have measured isotope shifts of the 5s18d ^1D_2 and 5s19s ^1S_0 Rydberg states. This technique could be applied to high-resolution, non-destructive measurements of ultra-cold Rydberg gases and plasmas.

S. Mauger; J. Millen; M. P. A. Jones

2007-10-05T23:59:59.000Z

262

Recent development of transparency and access to information at the federal level in Mexico.  

E-Print Network [OSTI]

??Transparency and access to information have become important elements of the Mexican political transition. The goal of this study is to contribute to the debate… (more)

Arteaga Cano, Issac Armando.

2007-01-01T23:59:59.000Z

263

Optical design of transparent metal grids for plasmonic absorption enhancement in ultrathin organic solar cells  

Science Journals Connector (OSTI)

Transparent metal grid combining with plasmonic absorption enhancement is a promising replacement to indium tin oxide thin films. We numerically demonstrate metal grids in one or two...

Kim, Inho; Lee, Taek Seong; Jeong, Doo Seok; Lee, Wook Seong; Kim, Won Mok; Lee, Kyeong-Seok

2013-01-01T23:59:59.000Z

264

Preparation of superhydrophobic and transparent micro-nano hybrid coatings from polymethylhydroxysiloxane and silica ormosil aerogels  

Science Journals Connector (OSTI)

Superhydrophobic and transparent polymethylhydroxysiloxane (PMHOS)/silica ormosil aerogel hybrids were prepared successfully by mixing of PMHOS with various weight percentages of silica ormosil aerogels (as sy...

Saravanan Nagappan; Jin Joo Park; Sung Soo Park; Chang-Sik Ha

2014-12-01T23:59:59.000Z

265

E-Print Network 3.0 - advanced transparency framework Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the image into estimates of illumination, ... Source: Winawer, Jonathan - Department of Psychology, Stanford University Collection: Biology and Medicine 25 Mapping Transparency...

266

Temperature control of some metallic conductors in the region of the melting point  

E-Print Network [OSTI]

for the degree of MASTER OF SCIENCE May 1961 Ma)or Sub)ect: Electrical Engineering TEMPE~ CONTROL OF SOME METALLIC CONDUCTORS IN THE REGION OF THE MELTING POINT 4 4 E 4 K 0 5 0 A Thesis by Arifur Rahman Approved as to style and content by: (Ch... irman of Committ (Head of Department) May 1961 'the writer wishes to express his appreciation and, gratitude to Nr. E. H. Roots, Assistant Professor, Electrical Engineering Department, and Nr. D. H. Kimberling, Director of the Machine Shop, Physics...

Rahman, Arifur

2012-06-07T23:59:59.000Z

267

Development of a Multifilament PIT V3Ga Conductor for Fusion Applications  

SciTech Connect (OSTI)

Previous studies on V{sub 3}Ga assert its suitability for use in proposed fusion reactors. V{sub 3}Ga may outperform Nb{sub 3}Sn in a fusion reactor environment based on its relatively flat critical-current profile in the 15 T-20 T range, resilience to applied strain, and reduced risk of induced radioactivity. A multifilament powder-in-tube V{sub 3}Ga conductor was designed, fabricated and tested with a focus on evaluating critical current versus applied field and applied strain performance, wire drawing difficulties, heat-treatment optimization, and overall feasibility of the concept.

Distin, J.S.; Ghosh, A.; Motowidlo, L.R.; Lee, P.J.; Larbalestier, D.C.; Lu, X.F.; Cheggour, N.; Stauffer, T.C.; Goodrich, L.F.

2011-08-03T23:59:59.000Z

268

Discovery-based design of transparent conducting oxide films  

Science Journals Connector (OSTI)

The properties of TCO materials derive from the nature, number, and atomic arrangements of metal cations in crystalline or amorphous oxide structures, from the resident morphology, and from the presence of intrinsic or intentionally introduced defects. An enormous body of literature can be accessed from which empirical relationships between structure, composition, charge transport, and transparency have been developed. Previous reviews of this subject have indicated how such information may be used for engineering TCO properties; however, application of more rigorous science-based approaches to the design of materials with superior properties has only recently been tackled. This article summarizes current TCO research results, reviews processing approaches, presents a microscopic description of electronic conductivity in transparent metal oxide systems, and offers guidelines for the design and subsequent development of new materials. The review concludes with a glimpse of some recent work where impedance matching and quantum mechanical tunneling approaches would seem to provide future directions for improving transmissivity in these and similar conducting oxide systems.

Gregory J. Exarhos; Xiao-Dong Zhou

2007-01-01T23:59:59.000Z

269

Achieving selective interrogation and sub-wavelength resolution in thin plates with embedded metamaterial acoustic lenses  

Science Journals Connector (OSTI)

In this study we present an approach to ultrasonic beam-forming and high resolution identification of acoustic sources having critical implications for applications such as structural health monitoring. The proposed concept is based on the design of dynamically tailored structural elements via embedded acoustic metamaterial lenses. This approach provides a completely new alternative to conventional phased-array technology enabling the formation of steerable and collimated (or focused) ultrasonic beams by exploiting a single transducer. Numerical results show that the ultrasonic beam can be steered by simply tuning the frequency of the excitation. Also the embedded lens can be designed to achieve sub-wavelength resolution to clustered acoustic sources which is a typical scenario encountered in incipient structural damage.

2014-01-01T23:59:59.000Z

270

Functional composites of plasmas and metamaterials: Flexible waveguides, and variable attenuators with controllable phase shift  

SciTech Connect (OSTI)

Numerical predictions and experimental results in this study verify that plasmas with negative permittivity work as functional media for electromagnetic waves and that their composites with metallic metamaterials show further extraordinary properties. Chain structures of individual plasmas with negative permittivity, forming a straight line and a L-shaped bent line, serve flexible waveguides via coupling structures of localized surface waves standing around each plasma. Further progresses as wave controllers are achievable in an array of the composites of plasmas and micro metallic resonators; functions of phase shifters and attenuators are individually controlled, with rotation of working points on the complex refractive index plane by varying gas conditions and permeability modulation. Such proposed sets of flexible combination will lead to advanced scientific products with novel functions.

Sakai, Osamu; Maeda, Jun; Shimomura, Takuya [Department of Electronic Science and Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan)] [Department of Electronic Science and Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan); Urabe, Keiichiro [Department of Electronic Science and Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan) [Department of Electronic Science and Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan); Department of Advanced Materials Science, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8561 (Japan)

2013-07-15T23:59:59.000Z

271

Theoretical Analysis of Metamaterial Insertions for Resistive-Wall Beam-Coupling Impedance Reduction  

E-Print Network [OSTI]

Resistive-wall impedance usually constitutes a significant percentage of the total beam-coupling impedance budget of an accelerator. Reduction techniques often entail high electrical-conductivity coatings. This paper investigates the use of negative-permittivity or negative-permeability materials for sensibly reducing or theoretically nearly cancelling resistive-wall impedance. The proposed approach is developed by means of an equivalent transmission-line model. The effectiveness of such materials is discussed both for negative-permittivity and for negative-permeability cases, which actually show different impacts and can be then target of proper engineering. This first-stage study opens the possibility of considering metamaterials for impedance mitigation or for proper experimental setups.

Danisi, A; Masi, A; Losito, R; Salvant, B

2014-01-01T23:59:59.000Z

272

Stability analysis of NbTi-Ta-based high field conductor cooled by pool boiling below 4 K  

SciTech Connect (OSTI)

Stability analysis has been performed for cabled NbTi-Ta-based superconductors intended for the high field (12 T) toroidal field coils for a large scale tokamak device such as ETF. Ternary NbTi-Ta was selected as the superconductor because of its superior critical current density at high field as compared to the binary alloy NbTi. The operating temperature was chosen to be 2.5 K or below to optimize the performance of the superconductor. A cabled conductor was selected to minimize the pulsed field losses. The conductor is cooled by pool boiling in a subcooled (approx. 2.5 K, 0.25 atm) bath, or in a superfluid helium (He-II) bath (approx. 1.8 K, 0.02 atm). The analysis was based on numerically simulating the evolution of a normal zone in the conductor. Appropriate superconductor properties and heat transfer characteristics were utilized in the simulation.

Chen, W.Y.; Alcorn, J.S.; Hsu, Y.H.; Purcell, J.R.

1980-09-01T23:59:59.000Z

273

The feasibility of low-mass conductors for toroidal superconducting magnets for SSC (Superconducting Super Collider) detectors  

SciTech Connect (OSTI)

An earlier study by Luton and Bonanos concluded that the design and fabrication of superconducting toroidal bending magnets would require a major effort but would be feasible. This study is an extension to examine the feasibility of low-mass conductors for such use. It included a literature search, consultations, with conductor manufacturers, and design calculations, but no experimental work. An unoptimized sample design that used a residual resistivity ratio for aluminum of 1360 and a current density of 3.5 kA/cm{sup 2} over the uninsulated conductor for a 4.5-T toroid with 1 GJ of stored energy obtained a hot-spot temperature of 120 K with a maximum dump voltage of 3.6 kV and 24% of the initial current inductively transferred into the shorted aluminum structure. The stability margin was 200 mJ/cm{sup 3} of cable space. Limiting the quench pressure to 360 atm to give conservative stresses in the sheath and assuming that the whole flow path quenched immediately resulted in helium taps that could be a kilometer apart if the flow friction factor were the same as that experienced in the Westinghouse (W) Large Coil Task (LCT) coil. This indicates that the 520-m conductor length of each of the 72 individual coil segments of a toroid would be a single flow path. If some practical uncertainties can be favorably resolved by producing and testing sample conductors, the use of a conductor with clad-aluminum stabilizer and extruded aluminum-alloy sheath should be feasible and economical. 9 refs., 3 figs.

Luton, J.N.

1990-01-01T23:59:59.000Z

274

Ballistic- and quantum-conductor carbon nanotubes: A reference experiment put to the test  

Science Journals Connector (OSTI)

We have performed electrical transport experiments on individual carbon nanotubes (CNTs) in situ in a transmission electron microscope using the liquid-metal contact method (LMC method), which consists of immersing a CNT placed on the apex of a metallic tip into a drop of liquid mercury (Hg). In the literature, this method has been mostly employed without visualization (ex situ) to show the ballistic- and quantum-conductance properties of different kinds of CNTs. We show that on the one hand the in situ LMC method is well suited to create low-resistance contacts with the CNTs but on the other hand the ballistic and quantum conductance measured by the ex situ LMC method is likely to give false positives for three reasons: (a) the CNTs are likely to be removed from the tip surface through contact with the Hg, (b) occurring Hg-tip surface nanocontacts are likely to be mistaken for quantum-conductor CNTs, and (c) occurring Hg nanomenisci are likely to be mistaken for ballistic-conductor CNTs. These findings have strong consequences for the interpretation of previously reported works.

M. Kobylko; M. Kociak; Y. Sato; K. Urita; A. M. Bonnot; A. Kasumov; Y. Kasumov; K. Suenaga; C. Colliex

2014-11-20T23:59:59.000Z

275

Hybrid model of quench propagation in coated conductors for fault current limiters  

Science Journals Connector (OSTI)

We developed a hybrid model of the quench propagation in coated conductors in the current limitation condition. This model combines the finite element method, to study the thermal behaviour of the coated conductors, and analytical calculation of the heat dissipation. We demonstrate that the evaluation of the heat dissipation can be conducted on a larger mesh than the FEM thermal problem. The results obtained with this model are in very good agreement with experiments, without the need of using free parameters for adjustment. Parametric studies are then conducted to evaluate the influence of both the substrate thickness and the layer interface thermal properties on the transition propagation behaviour. 3D simulations of a thin superconducting line placed on a wider substrate are also presented. Significant transverse heat propagation is observed in spite of the low thermal conductivity of the substrate, though this has little to no influence on the transition propagation along the line. These results are discussed in the context of FCL design.

Arnaud Badel; Louis Antognazza; Mathieu Therasse; Markus Abplanalp; C Schacherer; Michel Decroux

2012-01-01T23:59:59.000Z

276

Coated conductor arrangement for reduced AC losses in a resistive-type superconducting  

Science Journals Connector (OSTI)

The basic element of a resistive superconducting fault current limiter (FCL) can consist of coated conductor tape exceeding a few meters in length and compacted into a cryogenic envelope. This paper is focused on optimizing the arrangement of coated conductors with a non-magnetic substrate for a resistive superconducting FCL. Several configurations have been tested experimentally and theoretically. Two low-loss arrangements have been identified, both utilizing the bifilar configuration, i.e. the currents in two adjacent tapes are identical in amplitude but opposite in direction. The separation between two adjacent tapes s varied from 0.07 up to 2.10 mm. For the lowest examined separation s the AC transport loss of the straight bifilar model decreased by more than one order with respect to the AC transport loss in the single-tape configuration. Further AC loss decrease is achieved when the pair of tapes carrying opposite currents forms a flat pancake coil. We developed a numerical model in order to analyze the influence of distance between adjacent tapes. To achieve agreement between experimental and numerical results it was necessary to incorporate a lateral distribution of critical current density in the tape. The remaining differences between the results of experiment and calculation can be explained by analysis of experimental imperfections. Finally we suggest an empirical fit for the prediction of AC loss of a practical superconducting fault current limiter.

J Šouc; F Gömöry; M Vojen?iak

2012-01-01T23:59:59.000Z

277

A YBCO-coated conductor for a fault current limiter: architecture influences and optical  

Science Journals Connector (OSTI)

YBaCuO-coated conductors (CC) are particularly interesting for the electric grid, especially for superconducting (SC) fault current limiters (FCL). This innovative device should play an important part in the future electric energy landscape. New network diagrams are indeed imagined with DC buses. The SC FCL would solve the delicate problem of DC fault currents. We have studied several YBaCuO-coated conductors with different architectures. A test bench for optical measurements has been developed to study the bubble development during limitation or over-current operation. The observations give useful information about the quench initiation and its propagation. The images were recorded every 0.2 ms (or less). Preliminary experiments have been carried out using a copper strip. Several operating temperatures have been investigated and important differences have been observed in some cases. The different YBaCuO CC studied show very different behaviours. Bubbles appear under the shape of strips across the tape or show a homogeneous behaviour. These behaviours are correlated by electrical measurements.

N T Nguyen; P Tixador

2010-01-01T23:59:59.000Z

278

Thermodynamics of electromechanically coupled mixed ionic-electronic conductors: Deformation potential, Vegard strains, and flexoelectric effect  

Science Journals Connector (OSTI)

Strong coupling among external voltage, electrochemical potentials, concentrations of electronic and ionic species, and strains is a ubiquitous feature of solid state mixed ionic-electronic conductors (MIECs), the materials of choice in devices ranging from electroresistive and memristive elements to ion batteries and fuel cells. Here, we analyze in detail the electromechanical coupling mechanisms and derive generalized bias-concentration-strain equations for MIECs including contributions of concentration-driven chemical expansion, deformation potential, and flexoelectric effect. This analysis is extended toward the bias-induced strains in the uniform and scanning-probe-microscopy-like geometries. Notably, the contribution of the electron-phonon and flexoelectric coupling to the local surface displacement of the mixed ionic-electronic conductor caused by the electric field scanning probe microscope tip has not been considered previously. The developed thermodynamic approach allows evolving the theoretical description of mechanical phenomena induced by the electric fields (electromechanical response) in solid state ionics toward analytical theory and phase-field modeling of the MIECs in different geometries and under varying electrical, chemical, and mechanical boundary conditions.

A. N. Morozovska; E. A. Eliseev; A. K. Tagantsev; S. L. Bravina; Long-Qing Chen; S. V. Kalinin

2011-05-11T23:59:59.000Z

279

The perfect magnetic conductor (PMC) Casimir piston in d+1 dimensions  

E-Print Network [OSTI]

Perfect magnetic conductor (PMC) boundary conditions are dual to the more familiar perfect electric conductor (PEC) conditions and can be viewed as the electromagnetic analog of the boundary conditions in the bag model for hadrons in QCD. Recent advances and requirements in communication technologies have attracted great interest in PMC's and Casimir experiments involving structures that approximate PMC's may be carried out in the not too distant future. In this paper, we make a study of the zero-temperature PMC Casimir piston in $d+1$ dimensions. The PMC Casimir energy is explicitly evaluated by summing over $p+1$-dimensional Dirichlet energies where p ranges from 2 to $d$ inclusively. We derive two exact $d$-dimensional expressions for the Casimir force on the piston and find that the force is negative (attractive) in all dimensions. Both expressions are applied to the case of 2+1 and 3+1 dimensions. A spin-off from our work is a contribution to the PEC literature: we obtain a useful alternative expression for the PEC Casimir piston in 3+1 dimensions and also evaluate the Casimir force per unit area on an infinite strip, a geometry of experimental interest.

A. Edery; V. Marachevsky

2008-05-27T23:59:59.000Z

280

Life cycle cost study for coated conductor manufacture by electron beam and pulsed laser deposition systems  

SciTech Connect (OSTI)

The results of this study establish a framework for evaluation of the cost impact of many performance parameters in coated conductor manufacturing systems. Since the cost and concepts are based on early developmental results and engineering judgment, the study should be updated periodically based on latest data to enhance its usefulness. The study should be expanded to include other promising processes under consideration or development for manufacture of coated conductors. Review of this study by as wide a group of experts from industry, national laboratories and universities as possible is desirable to facilitate improving accuracy of the estimates and communication on the issues involved. The results for the case of achieving the $10/kA-m goal at a J{sub c} of 10{sup 5} a/cm{sup 2} applicable to applications requiring a magnetic field perpendicular to the direction of current flow may be viewed as somewhat discouraging. However, there is ample margin for improvement due to continued development and engineering that could enable meeting the goal of $10/kA-m.

Chapman, J.N.

1999-04-14T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Method and apparatus for fabrication of high gradient insulators with parallel surface conductors spaced less than one millimeter apart  

DOE Patents [OSTI]

Optical patterns and lithographic techniques are used as part of a process to embed parallel and evenly spaced conductors in the non-planar surfaces of an insulator to produce high gradient insulators. The approach extends the size that high gradient insulating structures can be fabricated as well as improves the performance of those insulators by reducing the scale of the alternating parallel lines of insulator and conductor along the surface. This fabrication approach also substantially decreases the cost required to produce high gradient insulators.

Sanders, David M. (Livermore, CA); Decker, Derek E. (Livermore, CA)

1999-01-01T23:59:59.000Z

282

JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS: Vol.100, No. 2, pp. 253-263, FEBRUARY1999 On the Optimal Insulation of Conductors1  

E-Print Network [OSTI]

On the Optimal Insulation of Conductors1 S. J. COX,2 B. KAWOHL,3 AND P. X. UHLIG4 Communicated by K. A. Lurie Abstract. We coat a conductor with an insulator and equate the effec- tiveness of this procedure with the rate at which the body dissipates heat when immersed in an ice bath. In the limit, as the thickness

Cox, Steven J.

283

Graphene growth on glass 1 Synthesis of conducting transparent few-layer graphene directly  

E-Print Network [OSTI]

Graphene growth on glass 1 Synthesis of conducting transparent few-layer graphene directly on glass major hurdles that research has to overcome to get graphene out of research laboratories. Here, using transparent graphene layers at temperatures as low as 450 °C. Our few-layer graphene grows at the interface

Paris-Sud XI, Université de

284

Transparent conductive grids via direct writing of silver nanoparticle inks Bok Yeop Ahn,a  

E-Print Network [OSTI]

. Using this approach, microscale features ($1 mm) in one-dimensional (1D) to three-dimensional (3D transparency and electrical conductivity.6 Recent efforts have focused on printing and other solution routes and co-workers have produced transparent conductive arrays by inkjet printing of dilute silver

Lewis, Jennifer

285

Erbium-doped transparent glass ceramic optical Characterization using mass spectroscopy and molecular dynamics modeling.  

E-Print Network [OSTI]

Erbium-doped transparent glass ceramic optical fibres: Characterization using mass spectroscopy) doped silica-based optical fibres with transparent glass ceramic (TGC) core were fabricated through properties of the erbium ions embedded within the phospho-silicate DNP. These results permit to get more

Boyer, Edmond

286

A Metal That Becomes Transparent under Pressure | Advanced Photon Source  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Under Pressure, Atoms Make Unlikely Alloys Under Pressure, Atoms Make Unlikely Alloys Slowing Down Near the Glass Transition New Light on Improving Engine Efficiencies The Crystal Structure of a Meta-stable Intermediate Particle in Virus Assembly Increasing Magnetic Response of Ferromagnetic Semiconductors under High Pressure Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed A Metal That Becomes Transparent under Pressure APRIL 20, 2009 Bookmark and Share Sodium clamped in a metallic rhenium gasket between diamond anvils. The photographs were taken through a diamond anvil under combined transmitted and reflected illumination. Sodium, a white metal at pressures below 1.1 Mbar (1 Mbar = 1 million atm), turns black at 1.3 Mbar and becomes

287

Microscopic modulation of mechanical properties in transparent insect wings  

SciTech Connect (OSTI)

We report on the measurement of local friction and adhesion of transparent insect wings using an atomic force microscope cantilever down to nanometre length scales. We observe that the wing-surface is decorated with 10??m long and 2??m wide islands that have higher topographic height. The friction on the islands is two orders of magnitude higher than the back-ground while the adhesion on the islands is smaller. Furthermore, the high islands are decorated with ordered nano-wire-like structures while the background is full of randomly distributed granular nano-particles. Coherent optical diffraction through the wings produce a stable diffraction pattern revealing a quasi-periodic organization of the high islands over the entire wing. This suggests a long-range order in the modulation of friction and adhesion which is directly correlated with the topography. The measurements unravel novel functional design of complex wing surface and could find application in miniature biomimetic devices.

Arora, Ashima; Kumar, Pramod; Bhagavathi, Jithin; Singh, Kamal P., E-mail: kpsingh@iisermohali.ac.in; Sheet, Goutam, E-mail: goutam@iisermohali.ac.in [Department of Physical Sciences, Indian Institute of Science Education and Research, Mohali, Punjab 140306 (India)

2014-02-10T23:59:59.000Z

288

Measurement of Dicke Narrowing in Electromagnetically Induced Transparency  

E-Print Network [OSTI]

Dicke narrowing is a phenomena that dramatically reduces the Doppler width of spectral lines, due to frequent velocity-changing collisions. A similar phenomena occurs for electromagnetically induced transparency (EIT) resonances, and facilitates ultra-narrow spectral features in room-temperature vapor. We directly measure the Dicke-like narrowing by studying EIT line-shapes as a function of the angle between the pump and the probe beams. The measurements are in good agreement with an analytic theory with no fit parameters. The results show that Dicke narrowing can increase substantially the tolerance of hot-vapor EIT to angular deviations. We demonstrate the importance of this effect for applications such as imaging and spatial solitons using a single-shot imaging experiment, and discuss the implications on the feasibility of storing images in atomic vapor.

M. Shuker; O. Firstenberg; R. Pugatch; A. Ben-Kish; A. Ron; N. Davidson

2007-03-13T23:59:59.000Z

289

Angular dependence of Dicke-narrowed electromagnetically induced transparency resonances  

SciTech Connect (OSTI)

Dicke narrowing is a phenomenon that dramatically reduces the Doppler width of spectral lines, due to frequent velocity-changing collisions. A similar phenomenon occurs for electromagnetically induced transparency (EIT) resonances, and facilitates ultranarrow spectral features in room-temperature vapor. We directly measure the Dicke-like narrowing by studying EIT line shapes as a function of the angle between the pump and probe beams. The measurements are in good agreement with an analytic theory with no fit parameters. The results show that Dicke narrowing can increase substantially the tolerance of hot-vapor EIT to angular deviations. We demonstrate the importance of this effect for applications such as imaging and spatial solitons using a single-shot imaging experiment, and discuss the implications for the feasibility of storing images in atomic vapor.

Shuker, M.; Firstenberg, O.; Ben-Kish, A.; Ron, A. [Department of Physics, Technion-Israel Institute of Technology, Haifa 32000 (Israel); Pugatch, R.; Davidson, N. [Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2007-08-15T23:59:59.000Z

290

Factorial design preparation of transparent conducting oxide thin films  

Science Journals Connector (OSTI)

Transparent and conducting properties of Cd2SnO4 films deposited onto glass substrates by the dip coating technique have been obtained using a 24 factorial design. All films were well adhered onto their substrates, presented porous morphology and inverse spinel structure. Statistical factorial design analysis showed that only substrate withdrawal rate and precursor solution concentration had significant effects on average transmission of the films. Cumulative probability graphs of factorial design model coefficients showed that none of the factor levels have significant effects on resistivity. However the films presented significantly higher resistivities using low withdrawal rates and low concentration levels. This indicates resistivity is a more complex function of the factor variables than transmission. From the factorial design experiments and statistical analysis of their results a highest average transmission of 88% and lowest resistivity of 2.43 × 10? 4 ? m were found.

Célia M. Ronconi; Oswaldo L. Alves; Roy E. Bruns

2009-01-01T23:59:59.000Z

291

Semi-transparent solar energy thermal storage device  

DOE Patents [OSTI]

A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls. Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

McClelland, John F. (Ames, IA)

1986-04-08T23:59:59.000Z

292

Semi-transparent solar energy thermal storage device  

DOE Patents [OSTI]

A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls, Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

McClelland, John F. (Ames, IA)

1985-06-18T23:59:59.000Z

293

Transparency in nuclear arms: Toward a nuclear weapons register  

SciTech Connect (OSTI)

In his press conference to present a {open_quotes}10-point non-proliferation initiative{close_quotes} last December, German Foreign Minister Klaus Kinkel included a proposal calling for an international register for nuclear weapons, analogous to the UN Conventional Arms Register. When German diplomats explained the initiative to their allies in London, Paris and Washington, they were sharply rebuffed. Apparently the three nuclear-weapon states were strongly opposed to the idea and therefore discouraged Germany from pursuing it further in the Conference on Disarmament (CD) in Geneva, where the ad hoc group on transparency in armaments would be an appropriate forum for further discussion. Faced with these cold responses, German diplomats shelved the idea for the time being and concentrated on initiatives that promised better chances for agreement, such as the comprehensive test ban (CTB) treaty currently under discussion, a fissile material cutoff agreement and an international plutonium management regime.

Mueller, H. [Peace Research Institute, Frankfurt (Germany)

1994-10-01T23:59:59.000Z

294

Do More Transparent Corporate Actions Following a Restatement Influence the SEC's Decision to Issue an Enforcement Action?  

E-Print Network [OSTI]

This study examines whether corporate transparency about a restatement influences the Securities and Exchange Commission's (SEC) decision to issue an enforcement action. I consider corporate transparency to be higher when firms initiate...

Files, Rebecca Lynn

2010-10-12T23:59:59.000Z

295

Normal and lateral Casimir interactions between semi-infinite conductors in the presence of a dispersive medium  

SciTech Connect (OSTI)

Path-integral formalism is employed to study normal and lateral Casimir interactions in a system composed of a dispersive medium surrounded by two semi-infinite ideal conductors. The dispersive medium is modeled by a continuum of harmonic oscillators, and it is shown that for smooth conductors, the normal force at small distances in the presence of a dispersive medium coincides with the original Casimir force, while at large distances, it tends to the original form with a renormalized coefficient. The correction to the normal force because of the roughness on one of the conductors is calculated. When the inner surfaces of both conductors have roughness, the lateral Casimir interaction occurs because of translational symmetry breaking, which is studied. It is shown that both normal and lateral Casimir forces in the presence of a dispersive medium are weaker in comparison with the original one and are proportional to the roughness amplitude squared. The dependence of the normal and lateral interactions on the memory and strength of the dispersive medium is considered.

Soltani, Morteza; Sarabadani, Jalal; Kheirandish, Fardin; Rabbani, Hasan [Department of Physics, University of Isfahan, Isfahan 81746 (Iran, Islamic Republic of); Department of Physics, Faculty of Science, University of Shahrkurd, Shahrkurd 88186 (Iran, Islamic Republic of)

2010-10-15T23:59:59.000Z

296

ON THE OPTIMAL INSULATION OF CONDUCTORS Steven J. Cox 1 , Bernhard Kawohl 2 , and Paul X. Uhlig 3  

E-Print Network [OSTI]

when immersed in an ice-- bath. In the limit, as the thickness and conductivity of the insulatorON THE OPTIMAL INSULATION OF CONDUCTORS Steven J. Cox 1 , Bernhard Kawohl 2 , and Paul X. Uhlig 3 1 with an insulator and equate the effectiveness of this procedure with the rate at which the body dissipates heat

Kawohl, Bernd

297

Dynamic Resistance of YBCO-Coated Conductors in Applied AC Fields with DC Transport Currents and DC Background Fields  

SciTech Connect (OSTI)

In order to predict heat loads in future saturable core fault-current-limiting devices due to ac fringing fields, dynamic resistance in YBCO-coated conductors was measured at 77 K in peak ac fields up to 25 mT at 60 Hz and in dc fields up to 1 T. With the sample orientation set such that the conductor face was either parallel or perpendicular to the ac and dc applied fields, the dynamic resistance was measured at different fractions of the critical current to determine the relationship between the dc transport current and the applied fields. With respect to field orientation, the dynamic resistance for ac fields that were perpendicular to the conductor face was significantly higher than when the ac fields were parallel to the conductor face. It was also observed that the dynamic resistance: (1) increased with increasing fraction of the dc transport current to the critical current, (2) was proportional to the inverse of the critical current, and (3) demonstrated a linear dependence with the applied ac field once a threshold field was exceeded. This functional behavior was consistent with a critical state model for the dynamic resistance, but discrepancies in absolute value of the dynamic resistance suggested that further theoretical development is needed.

Duckworth, Robert C [ORNL] [ORNL; Zhang, Yifei [ORNL] [ORNL; Ha, Tam T [ORNL] [ORNL; Gouge, Michael J [ORNL] [ORNL

2011-01-01T23:59:59.000Z

298

Formation of multiple levels of porous silicon for buried insulators and conductors in silicon device technologies  

DOE Patents [OSTI]

A method of forming a multiple level porous silicon substrate for semiconductor integrated circuits including anodizing non-porous silicon layers of a multi-layer silicon substrate to form multiple levels of porous silicon. At least one porous silicon layer is then oxidized to form an insulating layer and at least one other layer of porous silicon beneath the insulating layer is metallized to form a buried conductive layer. Preferably the insulating layer and conductive layer are separated by an anodization barrier formed of non-porous silicon. By etching through the anodization barrier and subsequently forming a metallized conductive layer, a fully or partially insulated buried conductor may be fabricated under single crystal silicon.

Blewer, Robert S. (Albuquerque, NM); Gullinger, Terry R. (Albuquerque, NM); Kelly, Michael J. (Albuquerque, NM); Tsao, Sylvia S. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

299

Novel solid state proton-conductors based on polymeric non-oxy acids. Final report  

SciTech Connect (OSTI)

Objectives of this project were to prepare and characterize novel solid state proton-conductors and to evaluate these compounds as fuel cell electrolytes. The thrust was on the synthesis of new proton-conducting ``model`` and ``polymeric`` compounds, based on acid functions of the type (R{sub f}SO{sub 2}){sub 2}NH and (R{sub f}SO{sub 2}){sub 2}CH{sub 2} in appropriate fluorinated carbon structures, their physics-chemical characterization (Infra-red, Nuclear Magnetic Resonance, Differential Scanning Calorimetry, and X-ray Diffraction), and is pro. evaluation as candidate fuel cell electrolytes for use at elevated temperatures. This project consisted of four tasks (i) Synthesis of Proton-Conducting Polymer Electrolytes; (ii) Physical and Chemical Characterization of Proton-Conducting Polymer Electrolytes; (iii) Electrochemical Characterization of Proton-Conducting Polymer Electrolytes; and (iv) Evaluation of Proton-Conducting Polymer Electrolytes for Fuel Cells.

Appleby, A.J.; Srinivasan, S.; Parthasarathy, A.; Gonzalez, E.R. [Texas A and M Univ., College Station, TX (United States). Center for Electrochemical Systems and Hydrogen Research; DesMarteau, D.; Gillette, M.S.; Ghosh, J.K. [Clemson Univ., SC (United States). Dept. of Chemistry; Jalan, V.; Desai, M. [ElectroChem, Inc., Woburn, MA (United States)

1992-01-01T23:59:59.000Z

300

Measurement of stability of cabled conductors cooled by He I at reduced temperature, or He II  

SciTech Connect (OSTI)

Stability tests of cabled NbTi alloy conductor are underway at the General Atomic High Field Test Facility, in support of the Team One effort of the DOE 12 Tesla Coil Development Program. A background field of up to 10 tesla within a 20 cm bore is provided by a nested pair of 4.2/sup 0/K bath cooled NbTi coils. An insulated bore insert tube (coldfinger) is provided in order to perform heat pulse/recovery tests of coiled samples in cooling regimes anticipated for the 1 m O.D. coil to be tested at the LLNL 12 tesla facility during FY 82. Specifically, tests are being performed in the 2.5 to 3/sup 0/K He I, and saturated superfluid (He II) regimes. The testing apparatus, procedures, and initial results are presented.

Hsu, Y.H.; Purcell, J.R.; Chen, W.Y.; Alcorn, J.S.

1980-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Magnetization losses in superconducting YBCO conductor-on-round-core (CORC) cables  

Science Journals Connector (OSTI)

Described are the results of magnetization loss measurements made at 77 K on several YBCO conductor-on-round-core (CORC) cables in ac magnetic fields of up to 80 mT in amplitude and frequencies of 50 to 200 Hz, applied perpendicular to the cable axis. The cables contained up to 40 tapes that were wound in as many as 13 layers. Measurements on the cables with different configurations were made as functions of applied ac field amplitude and frequency to determine the effects of their layout on ac loss. In large scale devices such as e.g. Superconducting Magnetic Energy Storage (SMES) magnets, the observed ac losses represent less than 0.1% of their stored energy.

M Majoros; M D Sumption; E W Collings; D C van der Laan

2014-01-01T23:59:59.000Z

302

Comparison of gold- and graphene-based resonant nano-structures for terahertz metamaterials and an ultra-thin graphene-based modulator  

E-Print Network [OSTI]

Graphene exhibits unique material properties and in electromagnetic wave technology, it raises the prospect of devices miniaturized down to the atomic length scale. Here we study split-ring resonator metamaterials made from graphene and we compare them to gold-based metamaterials. We find that graphene's huge reactive response derived from its large kinetic inductance allows for deeply subwavelength resonances, although its resonance strength is reduced due to higher dissipative loss damping and smaller dipole coupling. Nevertheless, tightly stacked graphene rings may provide for negative permeability and the electric dipole resonance of graphene meta-atoms turns out to be surprisingly strong. Based on these findings, we present a terahertz modulator based on a metamaterial with a multi-layer stack of alternating patterned graphene sheets separated by dielectric spacers. Neighbouring graphene flakes are biased against each other, resulting in modulation depths of over 75% at a transmission level of around 90%...

Shen, Nian-Hai; Koschny, Thomas; Soukoulis, Costas M

2014-01-01T23:59:59.000Z

303

Fabrication of biaxially textured templates for coated conductors by inclined substrate deposition.  

SciTech Connect (OSTI)

YBCO-coated conductors will enable the development of smaller, lighter, more-efficient electric power devices that can be operated at temperatures approaching that of liquid nitrogen. The critical current density (J{sub c}) of YBCO films on flexible metallic substrates has been significantly improved by epitaxially growing the YBCO on biaxially textured template films. Inclined substrate deposition (ISD) offers the potential for rapidly producing high-quality biaxially textured buffer layers that are suitable for YBCO-coated conductors. Using the ISD method, we have grown biaxially textured MgO films at deposition rates of 20-100 {angstrom}/sec. Electron microscopy of the ISD-MgO films revealed columnar grains topped off by MgO (002) planes, and X-ray pole figure analysis showed that the (002) planes are tilted with respect to the substrate normal, giving ISD-MgO films a roof-tile surface morphology. A small phi-scan full-width at half maximum of {approx}10{sup o} was observed on ISD-MgO films deposited with a substrate inclination of 55{sup o}. YBCO films were grown on ISD-MgO buffered Hastelloy substrates by pulsed laser deposition. A sample that was 0.42 {micro}m x 0.45 mm x 1 cm gave a transport J{sub c} of {approx}0.34 MA/cm{sup 2} at 77 K in self-field. Details of ISD-MgO film fabrication and characterization, as well as the results of YBCO deposited on the ISD-MgO architecture, are presented.

Dorris, S. E.; Ma, B.; Li, M.; Fisher, B. L.; Koritala, R. E.; Erck, R.; Miller, D. E.; Balachandran, U.

2002-08-21T23:59:59.000Z

304

Dimension-sensitive optical responses of electromagnetically induced transparency vapor in a waveguide  

Science Journals Connector (OSTI)

A three-level EIT (electromagnetically induced transparency) vapor is used to manipulate the transparency and absorption properties of the probe light in a waveguide. The most remarkable feature of the present scheme is such that the optical responses resulting from both electromagnetically induced transparency and large spontaneous emission enhancement are very sensitive to the frequency detunings of the probe light as well as to the small changes of the waveguide dimension. The potential applications of the dimension- and dispersion-sensitive EIT responses are discussed, and the sensitivity limits of some waveguide-based sensors, including electric absorption modulator, optical switch, wavelength sensor, and sensitive magnetometer, are analyzed.

Jian Qi Shen and Sailing He

2006-12-28T23:59:59.000Z

305

Magnetic Pair Creation Transparency in Gamma-Ray Pulsars  

E-Print Network [OSTI]

Magnetic pair creation $\\gamma \\to e^+e^-$ has been at the core of radio pulsar paradigms and central to polar cap models of gamma-ray pulsars for over three decades. The Fermi gamma-ray pulsar population now exceeds 140 sources and has defined an important part of Fermi's science legacy. Among the population characteristics well established is the common occurrence of exponential turnovers in their spectra in the 1--10 GeV range. These turnovers are too gradual to arise from magnetic pair creation in the strong magnetic fields of pulsar inner magnetospheres. By demanding insignificant photon attenuation precipitated by such single-photon pair creation, the energies of these turnovers for Fermi pulsars can be used to compute lower bounds for the typical altitude of GeV band emission. This paper explores such pair transparency constraints below the turnover energy, and updates earlier altitude bound determinations of that have been deployed in various Fermi pulsar papers. For low altitude emission locales, gen...

Story, Sarah A

2014-01-01T23:59:59.000Z

306

Colour transparency: a novel test of QCD in nuclear interactions  

E-Print Network [OSTI]

Colour transparency is a cute and indispensable property of QCD as the gauge theory of strong interaction. CT tests of QCD consist of production of the perturbative small-sized hadronic state and measuring the strngth of its non-perturbative diffraction nteraction in a nuclear matter. The energy depenednce of the final- state interaction in a nuclear matter probes a dynamical evolution from the perturbative small-sized state to the full-sized nonperturbative hadron. QCD observables of CT experiments correspond to a novel mechanism of scanning of hadronic wave functions from the large nonperturbative to the small perturbative size. In these lectures, which are addressed to experimentalists and theorists, I discuss the principle ideas of CT physics and the physics potential of the hadron and electron facilities in the > 10 GeV energy range. The special effort was made to present the material in the pedagigical and self-consistent way, with an emphasis on the underlying rich quantum-mechanical interference phenomena.

N. N. Nikolaev

1993-04-20T23:59:59.000Z

307

RPEMSC | U.S. DOE Office of Science (SC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Centers » Centers » RPEMSC Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers RPEMSC Print Text Size: A A A RSS Feeds FeedbackShare Page Re-Defining Photovoltaic Efficiency Through Molecule Scale Control Director(s): James Yardley Lead Institution: Columbia University Mission: To develop the enabling science needed to realize breakthroughs in the efficient conversion of sunlight into electricity in nanometer sized thin films. Research Topics: solar (photovoltaic), electrodes - solar, charge transport, materials and chemistry by design, optics, synthesis (novel materials) Materials Studied: MATERIALS: semiconductor, organic semiconductor, metal, polymer, optoelectronic and metamaterial, transparent conductor

308

Prospects of graphene electrodes in photovoltaics Yasin Khatami, Wei Liu, Jiahao Kang, and Kaustav Banerjee*  

E-Print Network [OSTI]

Prospects of graphene electrodes in photovoltaics Yasin Khatami, Wei Liu, Jiahao Kang, and Kaustav, the prospects of graphene for transparent conductors in photovoltaics are discussed. The recent advancements in a controllable manner. Keywords: Graphene, photovoltaics, transparent conductor 1. INTRODUCTION Transparent

309

Tungsten Nanowire Based Hyperbolic Metamaterial Emitters for Near-field Thermophotovoltaic Applications  

E-Print Network [OSTI]

Recently, near-field radiative heat transfer enhancement across nanometer vacuum gaps has been intensively studied between two hyperbolic metamaterials (HMMs) due to unlimited wavevectors and high photonic density of state. In this work, we theoretically analyze the energy conversion performance of a thermophotovoltaic (TPV) cell made of In0.2Ga0.8Sb when paired with a HMM emitter composed of tungsten nanowire arrays embedded in Al2O3 host at nanometer vacuum gaps. Fluctuational electrodynamics integrated with effective medium theory and anisotropic thin-film optics is used to calculate the near-field radiative heat transfer. It is found that the spectral radiative energy is enhanced by the epsilon-near-zero and hyperbolic modes at different polarizations. As a result, the power output from a semi-infinite TPV cell is improved by 1.85 times with the nanowire HMM emitter over that with a plain tungsten emitter at a vacuum gap of 10 nm. Moreover, by using a thin TPV cell with 10 um thickness, the conversion eff...

Chang, Jui-Yung; Wang, Liping

2014-01-01T23:59:59.000Z

310

Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications  

E-Print Network [OSTI]

We fabricate near-infrared absorbing organic photovoltaics that are highly transparent to visible light. By optimizing near-infrared optical-interference, we demonstrate power efficiencies of 1.3±0.1% with simultaneous ...

Lunt, Richard R.

311

Synthesis and characterization of transparent silica-based aerogels using methyltrimethoxysilane precursor  

Science Journals Connector (OSTI)

Silica-based aerogels with high transparency and high bending strength were prepared using methyltrimethoxysilane and non-ionic surfactant under supercritical drying condition of CO2. Non-ionic surfactant, ethyle...

Masayuki Nogami; Shohei Hotta…

2010-11-01T23:59:59.000Z

312

High figure-of-merit ultrathin metal transparent electrodes incorporating a conductive grid  

SciTech Connect (OSTI)

It is known that ultrathin (<10 nm) metal films (UTMFs) can achieve high level of optical transparency at the expense of the electrical sheet resistance. In this letter, we propose a design, the incorporation of an ad hoc conductive grid, which can significantly reduce the sheet resistance of UTMF based transparent electrodes, leaving practically unchanged their transparency. The calculated highest figure-of-merit corresponds to a filling factor and a grid spacing-to-linewidth ratio of 0.025 and 39, respectively. To demonstrate the capability of the proposed method the sheet resistance of a continuous 2 nm Ni film (>950 OMEGA/square) is reduced to approx6.5 OMEGA/square when a 100 nm thick Cu grid is deposited on it. The transparency is instead maintained at values exceeding 75%. These results, which can be further improved by making thicker grids, already demonstrate the potential in applications, such as photovoltaic cells, optical detectors and displays.

Ghosh, D. S.; Chen, T. L. [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels, Barcelona, 08860 Catalunya (Spain); Pruneri, V. [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels, Barcelona, 08860 Catalunya (Spain); ICREA-Institucio Catalana de Recerca i Estudis Avancats, 08010 Barcelona (Spain)

2010-01-25T23:59:59.000Z

313

Polymer material selection and testing of resistive wire arrangement for a transparent infant warming blanket  

E-Print Network [OSTI]

The ThermoCloud was designed as a portable, scalable, transparent electrical blanket to warm and insulate infants, while permitting hassle-free medical transportation and maximum visualization of a patient's thorax and ...

Salazar, Madeline

2013-01-01T23:59:59.000Z

314

Programmable window : a large-scale transparent electronic display using SPD film  

E-Print Network [OSTI]

This research demonstrates that Suspended Particle Device (SPD) film is a viable option for the development of large-scale transparent display systems. The thesis analyzes the SPD film from an architectural display application ...

Ramos, Martin (Ramos Rizo-Patron)

2004-01-01T23:59:59.000Z

315

Patternable transparent carbon nanotube films for electrochromic devices Liangbing Hu and George Grunera  

E-Print Network [OSTI]

Patternable transparent carbon nanotube films for electrochromic devices Liangbing Hu and George nanotube films on polyethylene terephthalate as flexible electrodes in electrochromic devices using. Electrochromic devices attract much interest due to their potential use in applications such as smart windows

Gruner, George

316

Factors Affecting Carbohydrate Production and the Formation of Transparent Exopolymer Particles (TEP) by Diatoms  

E-Print Network [OSTI]

Diatoms exude large amounts of exopolymers (EPS), which are predominantly composed of carbohydrates. EPS may coagulate into transparent exopolymer particles (TEP). Sticky TEP affects the formation of aggregates and marine snow, and consequently...

Chen, Jie

2014-03-25T23:59:59.000Z

317

Heat power capacity of the internal source in light-transparent coatings of planar solar collectors  

Science Journals Connector (OSTI)

The results are presented of numerical determination of the heat power capacity of the internal source in light-transparent coatings of planar solar collectors; the power results from partial absorption ... of th...

R. R. Avezov; N. R. Avezova; S. L. Lutpullaev; K. A. Samiev…

2007-09-01T23:59:59.000Z

318

Effects of Icon Concreteness and Complexity on Semantic Transparency: Younger vs. Older Users  

Science Journals Connector (OSTI)

The semantic transparency of icons in mobile devices was investigated using 48 icons for 12 mobile phone functions. Icons included original ones as well as icons specifically designed for experimental purposes. I...

Sabine Schröder; Martina Ziefle

2008-01-01T23:59:59.000Z

319

Gain to Absorption Ratio of Self-Induced Transparency Modelocked Quantum Cascade Lasers  

Science Journals Connector (OSTI)

A model to calculate the gain to absorption ratio of self-induced transparency modelocked quantum cascade lasers is presented and then used to find the gain to absorbing periods ratio...

Talukder, Muhammad; Menyuk, Curtis

320

Sanitizable signatures in XML signature: performance, mixing properties, and revisiting the property of transparency  

Science Journals Connector (OSTI)

We present the performance measures of our Java Cryptography Architecture (JCA) implementation that integrates sanitizable signature schemes into the XML Signature Specification. Our implementation shows mostly negligible performance impacts when using ... Keywords: XML signature framework, performance, sanitizable signatures, transparency

Henrich C. Pöhls; Kai Samelin; Joachim Posegga

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

GC Commits to Transparency on Nuclear Waste Fund Fee Adequacy Decisions |  

Broader source: Energy.gov (indexed) [DOE]

GC Commits to Transparency on Nuclear Waste Fund Fee Adequacy GC Commits to Transparency on Nuclear Waste Fund Fee Adequacy Decisions GC Commits to Transparency on Nuclear Waste Fund Fee Adequacy Decisions February 26, 2010 - 3:17pm Addthis Consistent with the Administration's commitment to transparency, DOE General Counsel Scott Blake Harris has decided that all future determinations as to the adequacy of the Nuclear Waste Fund fee will be made available to the public on DOE's website shortly after DOE makes a determination. The report relied upon in determining fee adequacy for 2008, the most recent year for which DOE has made a determination, is available here: (2008 Fee Adequacy Letter Report). Addthis Related Articles DOE Completes Annual Determination of the Adequacy of the Nuclear Waste Fund Fee Department of Energy Files Motion to Withdraw Yucca Mountain License

322

Two-oscillator model of trapped-modes interaction in a nonlinear bilayer fish-scale metamaterial  

E-Print Network [OSTI]

We discuss the similarity between the nature of resonant oscillations in two nonlinear systems, namely, a chain of coupled Duffing oscillators and a bilayer fish-scale metamaterial. In such systems two different resonant states arise which differ in their spectral lines. The spectral line of the first resonant state has a Lorentzian form, while the second one has a Fano form. This difference leads to a specific nonlinear response of the systems which manifests itself in appearance of closed loops in spectral lines and bending and overlapping of resonant curves. Conditions of achieving bistability and multistability are found out.

Tuz, Vladimir R; Kochetova, Lyudmila A; Mladyonov, Pavel L; Prosvirnin, Sergey L

2014-01-01T23:59:59.000Z

323

Carbon Ionic Conductors for use in Novel Carbon-Ion Fuel Cells  

SciTech Connect (OSTI)

Carbon-consuming fuel cells have many potential advantages, including increased efficiency and reduced pollution in power generation from coal. A large amount of work has already been done on coal fuel cells that utilize yttria-stabilized zirconium carbide as an oxygen-ion superionic membrane material. But high-temperature fuel cells utilizing yttria-stabilized zirconium require partial combustion of coal to carbon monoxide before final oxidation to carbon dioxide occurs via utilization of the oxygen- ion zirconia membrane. A carbon-ion superionic membrane material would enable an entirely new class of carbon fuel cell to be developed, one that would use coal directly as the fuel source, without any intervening combustion process. However, a superionic membrane material for carbon ions has not yet been found. Because no partial combustion of coal would be required, a carbon-ion superionic conductor would allow the direct conversion of coal to electricity and pure CO{sub 2} without the formation of gaseous pollutants. The objective of this research was to investigate ionic lanthanide carbides, which have an unusually high carbon-bond ionicity as potential superionic carbide-ion conductors. A first step in this process is the stabilization of these carbides in the cubic structure, and this stabilization has been achieved via the preparation of pseudobinary lanthanide carbides. The diffusion rates of carbon have been measured in these carbides as stabilized to preserve the high temperature cubic structure down to room temperature. To prepare these new compounds and measure these diffusion rates, a novel, oxide-based preparation method and a new C{sup 13}/C{sup 12} diffusion technique have been developed. The carbon diffusion rates in La{sup 0.5}Er{sup 0.5}C{sub 2}, Ce{sup 0.5}Er{sup 0.5}C{sub 2}, and La{sup 0.5}Y{sup 0.5}C{sub 2}, and Ce{sup 0.5}Tm0.5C{sub 2} modified by the addition of 5 wt %Be{sub 2}C, have been determined at temperatures from 850 C to 1150 C. The resulting diffusion constants as measured were all less than 10{sup -11} cm{sup 2}/sec, and therefore these compounds are not superionic. However, there remain a large number of potentially superionic pseudobinary lanthanide compounds and a number of alternate ionic carbides which might act as dopants to produce vacancies on the carbon-ion sublattice and thereby increase carbon-ion diffusion rates. The discovery of a superionic carbon conductor would usher in a truly revolutionary new coal technology, and could dramatically improve the way in which we generate electricity from coal. The work completed to date is a promising first step towards this end.

Franklin H. Cocks; W. Neal Simmons; Paul A. Klenk

2005-11-01T23:59:59.000Z

324

The new geospatial tools: global transparency enhancing safeguards verification  

SciTech Connect (OSTI)

This paper focuses on the importance and potential role of the new, freely available, geospatial tools for enhancing IAEA safeguards and how, together with commercial satellite imagery, they can be used to promote 'all-source synergy'. As additional 'open sources', these new geospatial tools have heralded a new era of 'global transparency' and they can be used to substantially augment existing information-driven safeguards gathering techniques, procedures, and analyses in the remote detection of undeclared facilities, as well as support ongoing monitoring and verification of various treaty (e.g., NPT, FMCT) relevant activities and programs. As an illustration of how these new geospatial tools may be applied, an original exemplar case study provides how it is possible to derive value-added follow-up information on some recent public media reporting of a former clandestine underground plutonium production complex (now being converted to a 'Tourist Attraction' given the site's abandonment by China in the early 1980s). That open source media reporting, when combined with subsequent commentary found in various Internet-based Blogs and Wikis, led to independent verification of the reporting with additional ground truth via 'crowdsourcing' (tourist photos as found on 'social networking' venues like Google Earth's Panoramio layer and Twitter). Confirmation of the precise geospatial location of the site (along with a more complete facility characterization incorporating 3-D Modeling and visualization) was only made possible following the acquisition of higher resolution commercial satellite imagery that could be correlated with the reporting, ground photos, and an interior diagram, through original imagery analysis of the overhead imagery.

Pabian, Frank Vincent [Los Alamos National Laboratory

2010-09-16T23:59:59.000Z

325

Effect of magnetic field with helical lines of force on the capillary instability of magnetic fluids with the interface surrounding a current-carrying conductor  

Science Journals Connector (OSTI)

The subject of investigation is a configuration made up of immiscible magnetic fluids surrounding a long current-carrying conductor in the presence of an external longitudinal magnetic field. The axisymmetric ...

V. M. Korovin

2006-08-01T23:59:59.000Z

326

Particle trap to sheath contact for a gas-insulated transmission line having a corrugated outer conductor  

DOE Patents [OSTI]

A particle trap to outer elongated conductor or sheath contact for gas-insulated transmission lines. The particle trap to outer sheath contact of the invention is applicable to gas-insulated transmission lines having either corrugated or non-corrugated outer sheaths. The contact of the invention includes an electrical contact disposed on a lever arm which in turn is rotatably disposed on the particle trap and biased in a direction to maintain contact between the electrical contact and the outer sheath.

Fischer, William H. (Pittsburgh, PA); Cookson, Alan H. (Pittsburgh, PA); Yoon, Kue H. (Pittsburgh, PA)

1984-04-10T23:59:59.000Z

327

Metamaterial mirrors in optoelectronic devices Majid Esfandyarpour1, Erik C. Garnett1, Yi Cui1,2, Michael D. McGehee1 and Mark L. Brongersma1  

E-Print Network [OSTI]

Metamaterial mirrors in optoelectronic devices Majid Esfandyarpour1, Erik C. Garnett1, Yi Cui1 is highly undesirable in optoelectronic devices that use metal films as both electrical contacts and optical optoelectronic devices becomes obvious when an active semiconductor layer is placed in direct contact

Cui, Yi

328

Nuclear qualified in-containment electrical connectors and method of connecting electrical conductors  

DOE Patents [OSTI]

A nuclear qualified in-containment electrical connection comprises an insulated, sheathed instrument lead having electrical conductors extending from one end thereof to provide two exposed lead wires, a watertight cable having electrical conducting wires therein and extending from one end of the cable to provide two lead wires therefrom, two butt splice connectors each connecting the ends of respective ones of the lead wires from the instrument lead and cable, a length of heat shrinkable plastic tubing positioned over each butt splice connector and an adjacent portion of a respective lead wire from the cable and heat shrunk into position, a length of heat shrinkable plastic tubing on the end portion of the instrument lead adjacent the lead wires therefrom and heat shrunk thereon and a length of outer heat shrinkable plastic tubing extending over the end portion of the instrument lead and the heat shrinkable tubing thereon and over the butt splice connectors and a portion of the cable adjacent the cable lead lines, the outer heat shrinkable tubing being heat shrunk into sealing position on the instrument lead and cable.

Powell, J. G. (Clifton Park, NY)

1991-01-01T23:59:59.000Z

329

Inclined-substrate deposition of biaxially textured magnesium oxide thin films for YBCO coated conductors.  

SciTech Connect (OSTI)

Highly textured MgO films were grown by the inclined-substrate deposition (ISD) technique at a high deposition rate. A columnar grain with a roofing-tile-shaped surface was observed in these MgO films. X-ray pole figure, and {phi}- and {omega}-scan were used to characterize in-plane and out-of-plane textures. MgO films deposited when the incline angle {alpha} was 55 and 30 degrees exhibited the best in-plane and out-of-plane texture, respectively. High-quality YBCO films were epitaxially grown on ISD-MgO-buffered Hastelloy C substrates by pulsed laser deposition. {Tc}=88 K, with sharp transition, and j{sub c} values of {approx}2x10{sup 5} A/cm{sup 2} at 77 K in zero field were observed on films 5 mm wide and 1 cm long. This work has demonstrated that biaxially textured ISD MgO buffer layers deposited on metal substrates are excellent candidates for fabrication of high-quality YBCO coated conductors.

Ma, B.; Li, M.; Jee, Y. A.; Koritala, R. E.; Fisher, B. L.; Balachandran, U.; Energy Technology

2002-02-01T23:59:59.000Z

330

Biaxially aligned template films fabricated by inclined-substrate deposition for YBCO-coated conductor applications.  

SciTech Connect (OSTI)

Inclined substrate deposition (ISD) has the potential for rapid production of high-quality biaxially textured buffer layers, which are important for YBCO-coated conductor applications. We have grown biaxially textured MgO films by ISD at deposition rates of 20-100 {angstrom}/sec. Columnar grains with a roof-tile surface structure were observed in the ISD-MgO films. X-ray pole figure analysis revealed that the (002) planes of the ISD-MgO films are tilted at an angle from the substrate normal. A small {phi}-scan full-width at half maximum (FWHM) of {approx}9{sup o} was observed on MgO films deposited at an inclination angle of 55{sup o}. In-plane texture in the ISD MgO films developed in the first 0.5 {micro}m from the interface, then stabilized with further increases in film thickness. YBCO films deposited by pulsed laser deposition on ISD-MgO buffered Hastelloy C276 substrates were biaxially aligned with the c-axis parallel to the substrate normal. T{sub c} of 91 K with a sharp transition and transport J{sub c} of 5.5 x 10{sup 5} A/cm{sup 2} at 77 K in self-field were measured on a YBCO film that was 0.46-{micro}m thick, 4-mm wide, 10-mm long.

Ma, B.; Li, M.; Koritala, R. E.; Fisher, B. L.; Erck, R. A.; Dorris, S. E.; Miller, D. J.; Balachandran, U.

2002-08-12T23:59:59.000Z

331

Future prospects for Nb/sub 3/Sn and V/sub 3/Ga multifilamentary conductors  

SciTech Connect (OSTI)

Since the discovery of the bronze process for fabrication of multifilamentary Nb/sub 3/Sn and V/sub 3/Ga composite wires, significant progress has been made in the production of commercial-scale conductors with these compounds. However, improvements in the values of the critical-current density J/sub c//sup +/ (the matrix and the superconductors) of these wires are desired and appear possible for high-magnetic-field applications. In this section, an attempt is made to assess the value of the current density which could be achieved in the future in multifilamentary Nb/sub 3/Sn and V/sub 3/Ga at magnetic fields above 10 tesla. In order to do this, promising superconducting properties of experimental wires at high fields are summarized, and based on these values, achievable J/sub c//sup +/ in multifilamentary Nb/sub 3/Sn and V/sub 3/GA wires are estimated. In the process, some suggestions for approaches to improve J/sub c//sup +/ are discussed.

Suenaga, M.

1981-01-01T23:59:59.000Z

332

Nitrogen-doped graphene as transparent counter electrode for efficient dye-sensitized solar cells  

SciTech Connect (OSTI)

Graphical abstract: Display Omitted Highlights: ? NG sheets are prepared through a hydrothermal reduction of graphite oxide. ? The transparent NG counter electrodes of DSCs are fabricated at room temperature. ? Transparent NG electrode exhibits excellent catalytic activity for the reduction of I{sub 3}{sup ?}. ? The DSC with NG electrode achieves a comparable efficiency to that of the Pt-based cell. ? The efficiency of rear illumination is about 85% that of front illumination. -- Abstract: Nitrogen-doped graphene sheets are prepared through a hydrothermal reduction of graphite oxide in the presence of ammonia and applied to fabricate the transparent counter electrode of dye-sensitized solar cells. The atomic percentage of nitrogen in doped graphene sample is about 2.5%, and the nitrogen bonds display pyridine and pyrrole-like configurations. Cyclic voltammetry studies demonstrate a much higher electrocatalytic activity toward I{sup ?}/I{sub 3}{sup ?} redox reaction for nitrogen-doped graphene, as compared with pristine graphene. The dye-sensitized solar cell with this transparent nitrogen-doped graphene counter electrode shows conversion efficiencies of 6.12% and 5.23% corresponding to front-side and rear-side illumination, respectively. Meanwhile, the cell with a Pt counter electrode shows a conversion efficiency of 6.97% under the same experimental condition. These promising results highlight the potential application of nitrogen-doped graphene in cost-effective, transparent dye-sensitized solar cells.

Wang, Guiqiang, E-mail: wgqiang123@163.com [School of Chemical Engineering, Shandong University of Technology, Zibo 255049 (China)] [School of Chemical Engineering, Shandong University of Technology, Zibo 255049 (China); Fang, Yanyan; Lin, Yuan [Institute of Chemistry, Chinese Academy of Science, Beijing 100080 (China)] [Institute of Chemistry, Chinese Academy of Science, Beijing 100080 (China); Xing, Wei; Zhuo, Shuping [School of Chemical Engineering, Shandong University of Technology, Zibo 255049 (China)] [School of Chemical Engineering, Shandong University of Technology, Zibo 255049 (China)

2012-12-15T23:59:59.000Z

333

NREL: Awards and Honors - PowerView Semi-Transparent Photovoltaic Module  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PowerView(tm) Semi-Transparent Photovoltaic Module PowerView(tm) Semi-Transparent Photovoltaic Module Developers: Harrin Ullal, Ken Zweibel, and Bolko von Roedern, National Renewable Energy Laboratory; Robert S. Oswald and Frank Liu, BP Solar The PowerView(tm) module - a BP Solar commercial product - represents the coming of a new era in photovoltaics for buildings. Because it is semi-transparent, it can be used in lieu of architectural glass for many applications, particularly for those that call for sloped glazing, such as awnings, canopies, or slanted roofs. And because it is photovoltaics, the module uses sunlight to generate clean electricity to power a building's electrical needs. As testimony to the PowerView's utility BP Solar has already installed it on canopies of hundreds of its Connect stores -

334

Proposal for broader United States-Russian transparency of nuclear arms reductions  

SciTech Connect (OSTI)

During the January 1994 Summit Presidents Clinton and Yeltsin agreed on the goal of ensuring the ``transparency and irreversibility`` of the nuclear arms reduction process. As a result, negotiations are presently underway between the United States Government and the Russian Federation to confirm the stockpiles of plutonium and highly enriched uranium removed from nuclear weapons. In December 1994 the United States presented a paper to the Russian Federation proposing additional measures to provide broader transparency of nuclear arms reduction. The US Department of Energy is studying the implementation of these broader transparency measures at appropriate DOE facilities. The results of the studies include draft protocols for implementation, assessments of the implementation procedures and the impacts on the facilities and estimates of the cost to implement these measures at various facilities.

Percival, C.M. [Sandia National Labs., Albuquerque, NM (United States); Ingle, T.H.; Bieniawski, A.J. [USDOE, Washington, DC (United States)

1995-07-01T23:59:59.000Z

335

Energy Dependence of Nuclear Transparency in C(p,2p) Scattering  

E-Print Network [OSTI]

The transparency of carbon for (p,2p) quasi-elastic events was measured at beam energies ranging from 6 to 14.5 GeV at 90 degrees c.m. The four momentum transfer squared q*q ranged from 4.8 to 16.9 (GeV/c)**2. We present the observed energy dependence of the ratio of the carbon to hydrogen cross sections. We also apply a model for the nuclear momentum distribution of carbon to normalize this transparency ratio. We find a sharp rise in transparency as the beam energy is increased to 9 GeV and a reduction to approximately the Glauber level at higher energies.

A. Leksanov; J. Alster; G. Asryan; Y. Averichev; D. Barton; V. Baturin; N. Bukhtoyarova; A. Carroll; S. Heppelmann; T. Kawabata; Y. Makdisi; E. Minina; I. Navon; A. Malki; H. Nicholson; A. Ogawa; Yu. Panebratsev; E. Piasetzky; A. Schetkovsky; S. Shimanskiy; A. Tang; J. W. Watson; H. Yoshida; D. Zhalov

2001-07-20T23:59:59.000Z

336

Conductive Polymer/Fullerene Blend Thin Films with Honeycomb...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

conductor. It can be formed over large areas. Applications and Industries Organic optoelectronic devices; photocells; transparent conductors. Patents and Patent Applications ID...

337

Electromagnetically induced transparency from two-phonon processes in quadratically coupled membranes  

SciTech Connect (OSTI)

We describe how electromagnetically induced transparency can arise in quadratically coupled optomechanical systems. Due to quadratic coupling, the underlying optical process involves a two-phonon process in an optomechanical system, and this two-phonon process makes the mean displacement, which plays the role of atomic coherence in traditional electromagnetically induced transparency (EIT), zero. We show how the fluctuation in displacement can play a role similar to atomic coherence and can lead to EIT-like effects in quadratically coupled optomechanical systems. We show how such effects can be studied using the existing optomechanical systems.

Huang, Sumei; Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

2011-02-15T23:59:59.000Z

338

Impact of transparent electrode on photoresponse of ZnO-based phototransistor  

SciTech Connect (OSTI)

ZnO-based photo-thin film transistors with enhanced photoresponse were developed using transparent conductive oxide contacts. Changing the electrode from opaque Mo to transparent In-Zn-O increases the photocurrent by five orders of magnitude. By changing the opacity of each source and drain electrode, we could observe how the photoresponse is affected. We deduce that the photocurrent generation mechanism is based on an energy band change due to the photon irradiation. More importantly, we reveal that the photocurrent is determined by the energy barrier of injected electrons at the interface between the source electrode and the active layer.

Lee, Seunghyup; Ahn, Seung-Eon, E-mail: seungeon.ahn@samsung.com; Jeon, Yongwoo; Ahn, Ji-Hoon; Song, Ihun; Kim, Jungwoo; Choi, Hyung; Chung, U-in; Park, Jaechul [Advanced Device Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Corporation, Yongin-Si, Gyeonggi-Do 446-712 (Korea, Republic of)] [Advanced Device Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Corporation, Yongin-Si, Gyeonggi-Do 446-712 (Korea, Republic of); Jeon, Sanghun [Department of Display and Semiconductor Physics and Department of Applied Physics, Korea University, 2511, Sejongro, Sejong, 339–700 (Korea, Republic of)] [Department of Display and Semiconductor Physics and Department of Applied Physics, Korea University, 2511, Sejongro, Sejong, 339–700 (Korea, Republic of); Yun, Dong-Jin [Analytical Science Group, Samsung Advanced Institute of Technology, Samsung Electronics Corporation, Yongin-Si, Gyeonggi-Do 446-712 (Korea, Republic of)] [Analytical Science Group, Samsung Advanced Institute of Technology, Samsung Electronics Corporation, Yongin-Si, Gyeonggi-Do 446-712 (Korea, Republic of)

2013-12-16T23:59:59.000Z

339

The Use of Large Transparent Ceramics in a High Powered, Diode Pumped Solid State Laser  

SciTech Connect (OSTI)

The advent of large transparent ceramics is one of the key enabling technological advances that have shown that the development of very high average power compact solid state lasers is achievable. Large ceramic neodymium doped yttrium aluminum garnet (Nd:YAG) amplifier slabs are used in Lawrence Livermore National Laboratory's (LLNL) Solid State Heat Capacity Laser (SSHCL), which has achieved world record average output powers in excess of 67 kilowatts. We will describe the attributes of using large transparent ceramics, our present system architecture and corresponding performance; as well as describe our near term future plans.

Yamamoto, R; Bhachu, B; Cutter, K; Fochs, S; Letts, S; Parks, C; Rotter, M; Soules, T

2007-09-24T23:59:59.000Z

340

Disorder-induced transparency in a one-dimensional waveguide side coupled with optical cavities  

SciTech Connect (OSTI)

Disorder influence on photon transmission behavior is theoretically studied in a one-dimensional waveguide side coupled with a series of optical cavities. For this sake, we propose a concept of disorder-induced transparency appearing on the low-transmission spectral background. Two kinds of disorders, namely, disorders of optical cavity eigenfrequencies and relative phases in the waveguide side coupled with optical cavities are considered to show the disorder-induced transparency. They both can induce the optical transmission peaks on the low-transmission backgrounds. The statistical mean value of the transmission also increases with increasing the disorders of the cavity eigenfrequencies and relative phases.

Zhang, Yongyou, E-mail: yyzhang@bit.edu.cn; Dong, Guangda; Zou, Bingsuo [Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems and School of Physics, Beijing Institute of Technology, Beijing 100081 (China)

2014-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Promoting Transparency and Strengthening Public Trust in Government through Information Communication Technologies?: A Study of Ghana's E-Governance Initiative  

Science Journals Connector (OSTI)

This paper attempts to examine Ghana's quest to use ICT as a tool to enhance transparency and build public trust in government. The questions the paper attempts to answer are: what are the main challenges confronting the government's e-governance initiative ... Keywords: ICT, Public Sector, Transparency, Trust, eGhana

Frank L. K. Ohemeng, Kwaku Ofosu-Adarkwa

2014-04-01T23:59:59.000Z

342

THE ONE-DIMENSIONAL SHALLOW WATER EQUATIONS WITH TRANSPARENT BOUNDARY CONDITIONS  

E-Print Network [OSTI]

THE ONE-DIMENSIONAL SHALLOW WATER EQUATIONS WITH TRANSPARENT BOUNDARY CONDITIONS MADALINA PETCU the question of the local in time well-posedness of the one-dimensional Shallow Water on an interval, these equations being supplemented with suitable boundary conditions. The flows considered are subcritical

Temam, Roger

343

Transparency portals versus open government data: an assessment of openness in Brazilian municipalities  

Science Journals Connector (OSTI)

Since the launch of the Open Government Partnership, several countries have acceded to this multilateral agreement to develop and to implement ambitious reforms to make their governments more open. Brazil, as one of the eight founding countries, has ... Keywords: e-Government, internet portals, open data, transparency

Andreiwid Sheffer Corrêa; Pedro Luiz Pizzigatti Corrêa; Flávio Soares Corrêa da Silva

2014-06-01T23:59:59.000Z

344

Measurement of Nuclear Transparency for the Ae; e0 B. Clasie,1  

E-Print Network [OSTI]

Universities Nuclear Laboratory, Duke University, Durham, North Carolina, USA 3 Argonne National LaboratoryMeasurement of Nuclear Transparency for the Ae; e0 Reaction B. Clasie,1 X. Qian,2 J. Arrington,3 for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA 2 Triangle

Gent, Universiteit

345

An X-ray transparent microfluidic platform for screening of the phase behavior of lipidic mesophases  

E-Print Network [OSTI]

An X-ray transparent microfluidic platform for screening of the phase behavior of lipidic are significant obstacles in such studies. Here we report a microfluidic platform that facilitates investigations platform was comprised of thin polydimethylsiloxane (PDMS) layers sandwiched between cyclic olefin

Kenis, Paul J. A.

346

Integration of Laser-Welded Ag Nanowire Transparent Conducting Layers on Photovoltaic Devices (DMR-0819860)  

E-Print Network [OSTI]

Integration of Laser-Welded Ag Nanowire Transparent Conducting Layers on Photovoltaic Devices (DMR conducting layers in applications ranging from organic flexible electronics to rigid photovoltaics. However of a hybrid organic photovoltaic device [1]. The NWs are dispersed on the device and the network is welded

Petta, Jason

347

Highly transparent Nb-doped indium oxide electrodes for organic solar cells  

SciTech Connect (OSTI)

The authors investigated the characteristics of Nb-doped In{sub 2}O{sub 3} (INbO) films prepared by co-sputtering of Nb{sub 2}O{sub 5} and In{sub 2}O{sub 3} for use in transparent anodes for organic solar cells (OSCs). To optimize the Nb dopant composition in the In{sub 2}O{sub 3} matrix, the effect of the Nb doping power on the resistivity and transparency of the INbO films were examined. The electronic structure and microstructure of the INbO films were also investigated using synchrotron x-ray absorption spectroscopy and x-ray diffraction examinations in detail. At the optimized Nb co-sputtering power of 30?W, the INbO film exhibited a sheet resistance of 15??/sq, and an optical transmittance of 86.04% at 550?nm, which are highly acceptable for the use as transparent electrodes in the fabrication of OSCs. More importantly, the comparable power conversion efficiency (3.34%) of the OSC with an INbO anode with that (3.31%) of an OSC with a commercial ITO anode indicates that INbO films are promising as a transparent electrode for high performance OSCs.

Kim, Jun Ho; Seong, Tae-Yeon [Department of Materials Science and Engineering, Korea University, Seoul 136-713 (Korea, Republic of); Na, Seok-In [Professional Graduate School of Flexible and Printable Electronics, Chonbuk National University, 664-14, Deokjin-dong, Jeongju-si, Jellabuk-do 561-756 (Korea, Republic of); Chung, Kwun-Bum [Department of Physics, Dankook University, Mt. 29, Anseo-Dong, Chenan 330-714 (Korea, Republic of); Lee, Hye-Min; Kim, Han-Ki, E-mail: imdlhkkim@khu.ac.kr [Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, 1 Seocheon-dong, Yongin, Gyeonggi-do 446-701 (Korea, Republic of)

2014-03-15T23:59:59.000Z

348

Highly ordered TiO2 macropore arrays as transparent photocatalysts  

Science Journals Connector (OSTI)

Highly ordered transparent TiO2 macropore arrays were synthesized via a simple glass-clamping method at room temperature. The as-synthesized TiO2 macropore arrays show high transmittance in the visible light region and can be used ...

Yuan Dong; Junfeng Chao; Zhong Xie; Xin Xu; Zhuoran Wang; Di Chen

2012-01-01T23:59:59.000Z

349

Silver nanowire transparent electrodes for liquid crystal-based smart windows  

E-Print Network [OSTI]

privacy glass or as energy saving windows through the modulation of solar heat gain [1,3,4]. The operating sheet resistance, and low-cost. While the benefits of increased transparency and low-cost are obvious Polymer dispersed liquid crystal Smart window a b s t r a c t A significant manufacturing cost of polymer

Goldthorpe, Irene

350

Transparent Cockpit: Visual Assistance System for Vehicle Using Retro-reflective Projection Technology  

E-Print Network [OSTI]

Transparent Cockpit: Visual Assistance System for Vehicle Using Retro-reflective Projection is displayed on the inner wall of the vehicle using a retro-reflective projection technology. In this system, such as the traffic sign detection system[l, 2], blind spot monitor[5, 11], night view system[13], and using a retro

Tachi, Susumu

351

Distributed XML Repositories: Top-down Design and Transparent Query Processing  

E-Print Network [OSTI]

Distributed XML Repositories: Top-down Design and Transparent Query Processing Michael Gertz Jan over the Web. However, design and query processing models for distributed XML data have not yet been studied in detail. The goal of this paper is to study the design and management of distributed XML

Gertz, Michael

352

Transparent adaptation of single-user applications for multi-user real-time collaboration  

Science Journals Connector (OSTI)

Single-user interactive computer applications are pervasive in our daily lives and work. Leveraging single-user applications for supporting multi-user collaboration has the potential to significantly increase the availability and improve the usability ... Keywords: Application sharing, CoPowerPoint, CoWord, computer-supported cooperative work, operational transformation, transparent adaptation

Chengzheng Sun; Steven Xia; David Sun; David Chen; Haifeng Shen; Wentong Cai

2006-12-01T23:59:59.000Z

353

Power broadening effects on Electromagnetically Induced Transparency in $^{20}$Ne vapor  

E-Print Network [OSTI]

We report here the first observation of electromagnetically induced transparency (EIT) in $^{20}$Ne. The power broadening of the EIT linewidth is measured as a function of neon pressure and RF excitation power. Doppler effects on the EIT broadening are found even at low pressures and low intensities, where the linewidth should be governed only by homogeneous effects.

Lubotzky, Boaz; Kong, Tao; Katz, Nadav; Ron, Guy

2014-01-01T23:59:59.000Z

354

Power broadening effects on Electromagnetically Induced Transparency in $^{20}$Ne vapor  

E-Print Network [OSTI]

We report here the first observation of electromagnetically induced transparency (EIT) in $^{20}$Ne. The power broadening of the EIT linewidth is measured as a function of neon pressure and RF excitation power. Doppler effects on the EIT broadening are found even at low pressures and low intensities, where the linewidth should be governed only by homogeneous effects.

Boaz Lubotzky; David Shwa; Tao Kong; Nadav Katz; Guy Ron

2014-02-25T23:59:59.000Z

355

Standardised and transparent model descriptions for agent-based models: Current status and prospects  

Science Journals Connector (OSTI)

Agent-based models are helpful to investigate complex dynamics in coupled human-natural systems. However, model assessment, model comparison and replication are hampered to a large extent by a lack of transparency and comprehensibility in model descriptions. ... Keywords: Agent-based modelling, Domain specific languages, Graphical representations, Model communication, Model comparison, Model design, Model development, Model replication, Standardised protocols

Birgit Müller, Stefano Balbi, Carsten M. Buchmann, Luís De Sousa, Gunnar Dressler, Jürgen Groeneveld, Christian J. Klassert, Quang Bao Le, James D. A. Millington, Henning Nolzen, Dawn C. Parker, J. Gary Polhill, Maja Schlüter, Jule Schulze, Nina Schwarz, Zhanli Sun, Patrick Taillandier, Hanna Weise

2014-05-01T23:59:59.000Z

356

TRANSPARENCY: Tracking Uranium under the U.S. / Russian HEU Purchase Agreement  

SciTech Connect (OSTI)

By the end of August, 2005, the Russia Federation delivered to the United States (U.S.) more than 7,000 metric tons (MT) of low enriched uranium (LEU) containing approximately 46 million SWU and 75,000 MT of natural uranium. This uranium was blended down from weapons-grade (nominally enriched to 90% {sup 235}U) highly enriched uranium (HEU) under the 1993 HEU Purchase Agreement that provides for the blend down of 500 MT HEU into LEU for use as fuel in commercial nuclear reactors. The HEU Transparency Program, under the National Nuclear Security Administration (NNSA), monitored the conversion and blending of the more than 250 MT HEU used to produce this LEU. The HEU represents more than half of the 500 MT HEU scheduled to be blended down through the year 2013 and is equivalent to the elimination of more than 10,000 nuclear devices. The HEU Transparency Program has made considerable progress in its mission to develop and implement transparency measures necessary to assure that Russian HEU extracted from dismantled Russian nuclear weapons is blended down into LEU for delivery to the United States. U.S. monitor observations include the inventory of in process containers, observation of plant operations, nondestructive assay measurements to determine {sup 235}U enrichment, as well as the examination of Material Control and Accountability (MC&A) documents. During 2005, HEU Transparency Program personnel will conduct 24 Special Monitoring Visits (SMVs) to four Russian uranium processing plants, in addition to staffing a Transparency Monitoring Office (TMO) at one Russian site.

Benton, J B; Decman, D J; Leich, D A

2005-10-19T23:59:59.000Z

357

Method for sputtering a PIN amorphous silicon semi-conductor device having partially crystallized P and N-layers  

DOE Patents [OSTI]

A high efficiency amorphous silicon PIN semiconductor device having partially crystallized (microcrystalline) P and N layers is constructed by the sequential sputtering of N, I and P layers and at least one semi-transparent ohmic electrode. The method of construction produces a PIN device, exhibiting enhanced electrical and optical properties, improved physical integrity, and facilitates the preparation in a singular vacuum system and vacuum pump down procedure.

Moustakas, Theodore D. (Annandale, NJ); Maruska, H. Paul (Annandale, NJ)

1985-07-09T23:59:59.000Z

358

Abstract--Layout of the conductor material in the dc bus of a photovoltaic (PV) array to lower first cost and ohmic losses is  

E-Print Network [OSTI]

its operating economy by reducing installed cost and ohmic losses. Index Terms--Photovoltaic systemsAbstract--Layout of the conductor material in the dc bus of a photovoltaic (PV) array to lower first cost and ohmic losses is reviewed. Six PV materials are characterized for their voltage swings

King, Roger

359

Use of the Proton Conductor Hydrogen Uranyl Phosphate Tetrahydrate as the Solid Electrolyte in Hydride-Air Batteries and Hydrogen-Oxygen Fuel Cells  

Science Journals Connector (OSTI)

Recent investigations1–9 of the good proton conductor HUO2PO4.4H2O (HUP) have opened up the prospects for its use as a solid electrolyte in a range of electrochemical cells involving transport of H+ ions. Hydroge...

Peter E. Childs; Arthur T. Howe

1980-01-01T23:59:59.000Z

360

JOURNAL DE PHYSIQUE Co[loqueC6, supplkment au no 7, Tome 41, Juillet 1980,page C6-17 FAST /ON CONDUCTORS.  

E-Print Network [OSTI]

CONDUCTORS. Quasielastic neutron scattering from a single crystal of a-AgI K. Funke (*), A. Hoch and R. E on a quasielastic neutron scattering experiment performed on a large single crystal of a-AgI. Time-of-flight spectra. - In this paper we give a first report on a quasielastic neutron scattering experiment performed on a large single

Boyer, Edmond

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Transparent Symmetric Active/Active Replication for Service-Level High Availability  

SciTech Connect (OSTI)

As service-oriented architectures become more important in parallel and distributed computing systems, individual service instance reliability as well as appropriate service redundancy becomes an essential necessity in order to increase overall system availability. This paper focuses on providing redundancy strategies using service-level replication techniques. Based on previous research using symmetric active/active replication, this paper proposes a transparent symmetric active/active replication approach that allows for more reuse of code between individual service-level replication implementations by using a virtual communication layer. Service- and client-side interceptors are utilized in order to provide total transparency. Clients and servers are unaware of the replication infrastructure as it provides all necessary mechanisms internally.

Engelmann, Christian [ORNL; Scott, Stephen L [ORNL; Leangsuksun, Chokchai [Louisiana Tech University; He, X. [Tennessee Technological University

2007-01-01T23:59:59.000Z

362

Thickness measurement system for transparent plates using dual digital versatile disc (DVD) pickups  

SciTech Connect (OSTI)

A low-cost high-precision thickness measurement system for transparent plates that uses dual digital versatile disc (DVD) pickups is proposed. The two DVD pickups are used as the transmitter and the receiver in the measurement system, respectively. One of the DVD pickups emits a laser to the other DVD pickup (receiver) and projects on the photodiode integrated circuit of the receiver. The transparent plate is placed in the optical path to change the focused point that will affect the focusing error signal (FES) of the receiver. Using the FES, a mathematical model for thickness measurement based on the geometric optical method is developed. The experimental results show that the accuracy is 1.5 {mu}m, and the uncertainty is estimated to be {+-}1.37 {mu}m for the measured thickness of 150{mu}m.

Liu, Chien-Hung; Yeh, Shien-Chang; Huang, Hsueh-Liang

2010-02-01T23:59:59.000Z

363

Electromagnetically induced transparency with Laguerre-Gaussian modes in ultracold rubidium  

E-Print Network [OSTI]

We demonstrate electromagnetically induced transparency with the control laser in a Laguerre-Gaussian mode. The transmission spectrum is studied in an ultracold gas for the D2 line in both $^{85}$Rb and $^{87}$Rb, where the decoherence due to diffusion of the atomic medium is negligible. We compare these results to a similar configuration, but with the control laser in the fundamental laser mode. We model the transmission of a probe laser under both configurations, and we find good agreement with the experiment. We conclude that the use of Laguerre-Gaussian modes in electromagnetically induced transparency results in narrower resonance linewidths as compared to uniform control laser intensity. The narrowing of the linewidth is caused by the spatial distribution of the Laguerre-Gaussian intensity profile.

Akin, T G; Marino, A M; Abraham, E R I

2014-01-01T23:59:59.000Z

364

Spin-polarized currents in the tunnel contact of a normal conductor and a two-dimensional topological insulator  

SciTech Connect (OSTI)

The spin filtering of electrons tunneling from the edge states of a two-dimensional topological insulator into a normal conductor under a magnetic field (external or induced due to proximity to a magnetic insulator) is studied. Calculations are performed for a tunnel contact of finite length between the topological insulator and an electronic multimode quantum strip. It is shown that the flow of tunneling electrons is split in the strip, so that spin-polarized currents arise in its left and right branches. These currents can be effectively controlled by the contact voltage and the chemical potential of the system. The presence of a magnetic field, which splits the spin subbands of the electron spectrum in the strip, gives rise to switching of the spin current between the strip branches.

Sukhanov, A. A., E-mail: AASukhanov@yandex.ru; Sablikov, V. A. [Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Fryazino branch) (Russian Federation)] [Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Fryazino branch) (Russian Federation)

2013-11-15T23:59:59.000Z

365

Transparent Slippery Surfaces Made with Sustainable Porous Cellulose Lauroyl Ester Films  

Science Journals Connector (OSTI)

(c) Transparency of various nanoporous CLE films (dotted lines) and corresponding slippery CLE films (solid lines). ... The critical magnetic field required to start the drop in motion was 0.06 T (measured at a 20 mm drop–magnet distance by a Teslameter, Projekt Elektronik GmbH, Berlin). ... (c) Magnetic glycerol drop (60 ?L) divided into two droplets by two magnets applied beside the drop. ...

Longquan Chen; Andreas Geissler; Elmar Bonaccurso; Kai Zhang

2014-04-22T23:59:59.000Z

366

Electromagnetically Induced Transparency and Light Storage in an Atomic Mott Insulator  

E-Print Network [OSTI]

We experimentally demonstrate electromagnetically induced transparency and light storage with ultracold 87Rb atoms in a Mott insulating state in a three dimensional optical lattice. We have observed light storage times of about 240 ms, to our knowledge the longest ever achieved in ultracold atomic samples. Using the differential light shift caused by a spatially inhomogeneous far detuned light field we imprint a "phase gradient" across the atomic sample, resulting in controlled angular redirection of the retrieved light pulse.

U. Schnorrberger; J. D. Thompson; S. Trotzky; R. Pugatch; N. Davidson; S. Kuhr; I. Bloch

2009-03-01T23:59:59.000Z

367

An Original Route to Immobilize an Organic Biocide onto a Transparent Tin Dioxide Electrode  

Science Journals Connector (OSTI)

An Original Route to Immobilize an Organic Biocide onto a Transparent Tin Dioxide Electrode ... Chloramine is increasingly being considered as an alternative final disinfectant to chlorine in drinking water treatment even if it is generally not as potent as free chlorine against planktonic organisms. ... Moreover, the detection of chlorine by XPS (surface sensitive) and by EDX (bulk sensitive) indicates that the organic deposit is chlorinated throughout its thickness. ...

Catherine Debiemme-Chouvy; Sanae Haskouri; Guy Folcher; Hubert Cachet

2007-02-21T23:59:59.000Z

368

Characterization of a high-temperature superconducting conductor on round core cables in magnetic fields up to 20 T  

SciTech Connect (OSTI)

The next generation of high-field magnets that will operate at magnetic fields substantially above 20 T, or at temperatures substantially above 4.2 K, requires high-temperature superconductors (HTS). Conductor on round core (CORC) cables, in which RE-Ba{sub 2}Cu{sub 3}O{sub 7-{delta}} (RE = rare earth) (REBCO) coated conductors are wound in a helical fashion on a fl?exible core, are a practical and versatile HTS cable option for low-inductance, high-field magnets. We performed the first tests of CORC magnet cables in liquid helium in magnetic fields of up to 20 T. A record critical current I{sub c} of 5021 A was measured at 4.2 K and 19 T. In a cable with an outer diameter of 7.5 mm, this value corresponds to an engineering current density J{sub e} of 114 A mm{sup -2} , the highest J{sub e} ever reported for a superconducting cable at such high magnetic fields. Additionally, the first magnet wound from an HTS cable was constructed from a 6 m-long CORC cable. The 12-turn, double-layer magnet had an inner diameter of 9 cm and was tested in a magnetic field of 20 T, at which it had an I{sub c} of 1966 A. The cables were quenched repetitively without degradation during the measurements, demonstrating the feasibility of HTS CORC cables for use in high-field magnet applications.

van der Laan, Danko [Advanced Conductor Technologies; Noyes, Patrick [National High Magnetic Field Laboratory; Miller, George [National High Magnetic Field Laboratory; Weijers, Hubertus [National High Magnetic Field Laboratory; Willering, Gerard [CERN

2013-02-13T23:59:59.000Z

369

Photocatalytic remediation of indoor pollution by transparent TiO2 films  

Science Journals Connector (OSTI)

Abstract Transparent, mechanically robust TiO2 films obtained by an innovative electrochemically assisted procedure are presented as effective photocatalysts for environmental remediation and self-cleaning. The film morphology and optical properties were investigated by scanning electron microscopy (SEM), and UV–vis spectroscopy. Mechanical tests (Wolff Wilborn hardness and adhesion tests) proved the high robustness of the layer. The film thickness could be modulated by varying the number of deposited layers (from 1 to 5) without altering the film transparency. A fast light-induced superhydrophilicity is observed even under solar irradiation. The photocatalytic remediation activity of the films was tested under UV and solar irradiation towards two different systems: the gas phase degradation of volatile organic compounds, \\{VOCs\\} (ethanol and acetaldehyde) and the degradation of dry stains of long chain organic molecules (siloxanes) adsorbed at the film surface to simulate the staining by fingerprints/oily liquids. The titania layers showed excellent photocatalytic activity in both tested systems under UV and simulated solar irradiation. The photocatalyst deactivation upon repeated degradation tests was observed to be very limited. The presented stable and transparent TiO2 layers represent promising materials for photocatalytic windows and coatings.

Alice Antonello; Guido Soliveri; Daniela Meroni; Giuseppe Cappelletti; Silvia Ardizzone

2014-01-01T23:59:59.000Z

370

In0,53Ga0.47Asp-i-n photodiodes with transparent cadmium tin oxide contacts  

E-Print Network [OSTI]

In0,53Ga0.47Asp-i-n photodiodes with transparent cadmium tin oxide contacts Paul R. Berger,a) Niloy for publication 28 July 1992) A new type of p-i-n In,,,,GaO,,,As photodiode having an optically transparent into the i-region is not relevant avoiding an increased dark current. The photodiodes exhibited leakage

371

A Job Pause Service under LAM/MPI+BLCR for Transparent Fault Tolerance  

SciTech Connect (OSTI)

Checkpoint/restart (C/R) has become a requirement for long-running jobs in large-scale clusters due to a meantime- to-failure (MTTF) in the order of hours. After a failure, C/R mechanisms generally require a complete restart of an MPI job from the last checkpoint. A complete restart, however, is unnecessary since all but one node are typically still alive. Furthermore, a restart may result in lengthy job requeuing even though the original job had not exceeded its time quantum. In this paper, we overcome these shortcomings. Instead of job restart, we have developed a transparent mechanism for job pause within LAM/MPI+BLCR. This mechanism allows live nodes to remain active and roll back to the last checkpoint while failed nodes are dynamically replaced by spares before resuming from the last checkpoint. Our methodology includes LAM/MPI enhancements in support of scalable group communicationwith fluctuating number of nodes, reuse of network connections, transparent coordinated checkpoint scheduling and a BLCR enhancement for job pause. Experiments in a cluster with the NAS Parallel Benchmark suite show that our overhead for job pause is comparable to that of a complete job restart. A minimal overhead of 5.6% is only incurred in case migration takes place while the regular checkpoint overhead remains unchanged. Yet, our approach alleviates the need to reboot the LAM run-time environment, which accounts for considerable overhead resulting in net savings of our scheme in the experiments. Our solution further provides full transparency and automation with the additional benefit of reusing existing resources. Executing continues after failures within the scheduled job, i.e., the application staging overhead is not incurred again in contrast to a restart. Our scheme offers additional potential for savings through incremental checkpointing and proactive diskless live migration, which we are currently working on.

Wang, Chao [North Carolina State University; Mueller, Frank [North Carolina State University; Engelmann, Christian [ORNL; Scott, Steven L [ORNL

2007-01-01T23:59:59.000Z

372

A Relativistic Plasma Polarizer: Impact of Temperature Anisotropy on Relativistic Transparency  

E-Print Network [OSTI]

3D particle-in-cell simulations demonstrate that the enhanced transparency of a relativistically hot plasma is sensitive to how the energy is partitioned between different degrees of freedom. For an anisotropic electron distribution, propagation characteristics, like the critical density, will depend on the polarization of the electromagnetic wave. Despite the onset of the Weibel instability in such plasmas, the anisotropy can persist long enough to affect laser propagation. This plasma can then function as a polarizer or a waveplate to dramatically alter the pulse polarization.

Stark, David J; Arefiev, Alexey V; Hazeltine, R D; Mahajan, S M

2014-01-01T23:59:59.000Z

373

Nondegenerate phase-conjugate wave via stored atomic coherence based on electromagnetically induced transparency in solids  

SciTech Connect (OSTI)

A nondegenerate phase-conjugate wave was generated via stored atomic coherence in a Pr{sup 3+}:Y{sub 2}SiO{sub 5} crystal based on the electromagnetically induced transparency effect, and its capability for wave-front reconstruction of phase distortion was demonstrated experimentally. The phase-matching condition during the storage-retrieval process of the phase-conjugate wave was characterized both experimentally and theoretically in detail. Theoretical simulations fit the experimental data very well. Such a scheme of storage and retrieval of the phase-conjugate wave may have potential applications in optical signal processing and information security.

Zhai Zhaohui; Dou Yiling; Xu Jingjun; Zhang Guoquan [MOE Key Laboratory of Weak Light Nonlinear Photonics, Nankai University, Tianjin 300457 (China); School of Physics, Nankai University, Tianjin 300071 (China) and Applied Physics School, TEDA College, Nankai University, Tianjin 300457 (China)

2011-04-15T23:59:59.000Z

374

Amorphous semiconducting and conducting transparent metal oxide thin films and production thereof  

DOE Patents [OSTI]

Metal oxide thin films and production thereof are disclosed. An exemplary method of producing a metal oxide thin film may comprise introducing at least two metallic elements and oxygen into a process chamber to form a metal oxide. The method may also comprise depositing the metal oxide on a substrate in the process chamber. The method may also comprise simultaneously controlling a ratio of the at least two metallic elements and a stoichiometry of the oxygen during deposition. Exemplary amorphous metal oxide thin films produced according to the methods herein may exhibit highly transparent properties, highly conductive properties, and/or other opto-electronic properties.

Perkins, John (Boulder, CO); Van Hest, Marinus Franciscus Antonius Maria (Lakewood, CO); Ginley, David (Evergreen, CO); Taylor, Matthew (Golden, CO); Neuman, George A. (Holland, MI); Luten, Henry A. (Holland, MI); Forgette, Jeffrey A. (Hudsonville, MI); Anderson, John S. (Holland, MI)

2010-07-13T23:59:59.000Z

375

Broadband light absorption enhancement in polymer photovoltaics using metal nanowall gratings as transparent electrodes  

SciTech Connect (OSTI)

The authors investigate light absorption in organic solar cells in which indium tin oxide (ITO) is replaced by a new metallic architecture (grating) as a transparent electrode. Different from typical metal nanowire gratings, our gratings consist of metal nanowalls with nanoscale footprint and (sub)microscale height [Adv. Mater. 23, 2469 (2011)], thus ensuring high optical transmittance and electrical conductivity. Simulations reveal that a broadband and polarization-insensitive light absorption enhancement is achieved via two mechanisms, when such silver nanowall gratings are employed in P3HT:PCBM based solar cells. Overall absorption enhanced by ~23% compared to a reference cell with ITO electrode.

Ye, Zhuo; Chaudhary, Sumit; Kuang, Ping; Ho, Kai-Ming

2012-05-15T23:59:59.000Z

376

Doping stability and opto-electronic performance of CVD graphene on transparent flexible substrates  

E-Print Network [OSTI]

-dimensional honeycomb of single carbon atoms, has a myriad of impressive, novel optical and electrical properties [1, 2]. As such, it has attracted much attention as a promising material to complement indium tin oxide in large area transparent electrodes for many... transferred to laminate and PET substrates (ATI, Unicam UV2). The transmittance (550 nm) of graphene on PET and on laminate was 10% and 12% lower than the as-received PET and laminate, respectively. The high optical absorption suggests around four layer...

Kang, Moon Hyo; Milne, William I.; Cole, Matthew T.

2014-07-15T23:59:59.000Z

377

Theory of Thermal Motion in Electromagnetically Induced Transparency: Diffusion, Doppler, Dicke and Ramsey  

E-Print Network [OSTI]

We present a theoretical model for electromagnetically induced transparency (EIT) in vapor, that incorporates atomic motion and velocity-changing collisions into the dynamics of the density-matrix distribution. Within a unified formalism we demonstrate various motional effects, known for EIT in vapor: Doppler-broadening of the absorption spectrum; Dicke-narrowing and time-of-flight broadening of the transmission window for a finite-sized probe; Diffusion of atomic coherence during storage of light and diffusion of the light-matter excitation during slow-light propagation; and Ramsey-narrowing of the spectrum for a probe and pump beams of finite-size.

O. Firstenberg; M. Shuker; R. Pugatch; D. R. Fredkin; N. Davidson; A. Ron

2008-01-30T23:59:59.000Z

378

Turning ultraviolet-green into red light in transparent phosphate glasses for greenhouses  

Science Journals Connector (OSTI)

Sb3+/Mn2+ co-doped phosphate glasses were prepared by high temperature melting method. The absorption excitation and emission spectra of the glasses were investigated. The glasses are transparent in the visible light region and can emit strong red light under 275 360 415 or 520?nm excitation. Under 275?nm excitation the emission colors of the glasses can vary from blue to red with the increasing of Mn2+ ion concentration. The materials will be helpful in developing glass greenhouse for the green plants.

Chengguo Ming; Feng Song; Liqun An; Xiaobin Ren

2013-01-01T23:59:59.000Z

379

Highly Transparent, Flexible, and Thermally Stable Superhydrophobic ORMOSIL Aerogel Thin Films  

Science Journals Connector (OSTI)

(9, 22) On the other hand, ORMOSIL aerogel thin films produced in this work are highly transparent, do not need any pre or post surface treatments and can be applied on a variety of substrates including glass, wood, and plastics at ambient conditions with common thin-film deposition methods such as spin, dip, and spray coating. ... (b) Photographs of ORMOSIL aerogel thin films coated on glass substrates. ... This makes it possible to coat superhydrophobic aerogels on many different surfaces other than glass, including wood, wall tile, aluminum slab, cotton cloth, and plastics, which enables fast and easy production of large-scale superhydrophobic coatings. ...

Hulya Budunoglu; Adem Yildirim; Mustafa O. Guler; Mehmet Bayindir

2011-01-12T23:59:59.000Z

380

A stable frequency comb directly referenced to rubidium electromagnetically induced transparency and two-photon transitions  

SciTech Connect (OSTI)

We demonstrate an approach to create a stable erbium-fiber-based frequency comb at communication band by directly locking the combs to two rubidium atomic transitions resonances (electromagnetically induced transparency absorption and two-photon absorption), respectively. This approach directly transfers the precision and stability of the atomic transitions to the comb. With its distinguishing feature of compactness by removing the conventional octave-spanning spectrum and f-to-2f beating facilities and the ability to directly control the comb's frequency at the atomic transition frequency, this stable optical comb can be widely used in optical communication, frequency standard, and optical spectroscopy and microscopy.

Hou, Dong; Wu, Jiutao; Zhang, Shuangyou; Ren, Quansheng; Zhang, Zhigang; Zhao, Jianye, E-mail: zhaojianye@pku.edu.cn [Department of Electronics, Peking University, Beijing, 100871 (China)

2014-03-17T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

buffer Layer Growth, the Thickness Dependence of Jc in Coated Conductors, Local Identification of Current Limiting Mechanisms and Participation in the Wire Development Group  

SciTech Connect (OSTI)

The primary thrusts of our work were to provide critical understanding of how best to enhance the current-carrying capacity of coated conductors. These include the deconstruction of Jc as a function of fim thickness, the growth of in situ films incorporating strong pinning centers and the use of a suite of position-sensitive tools that enable location and analysis of key areas where current-limiting occurs.

Larbalestier, David; Hellstron, Eric; Abraimov, Dmytro

2011-12-17T23:59:59.000Z

382

Parameters influencing the deposition of methylammonium lead halide iodide in hole conductor free perovskite-based solar cells  

SciTech Connect (OSTI)

Perovskite is a promising light harvester for use in photovoltaic solar cells. In recent years, the power conversion efficiency of perovskite solar cells has been dramatically increased, making them a competitive source of renewable energy. An important parameter when designing high efficiency perovskite-based solar cells is the perovskite deposition, which must be performed to create complete coverage and optimal film thickness. This paper describes an in-depth study on two-step deposition, separating the perovskite deposition into two precursors. The effects of spin velocity, annealing temperature, dipping time, and methylammonium iodide concentration on the photovoltaic performance are studied. Observations include that current density is affected by changing the spin velocity, while the fill factor changes mainly due to the dipping time and methylammonium iodide concentration. Interestingly, the open circuit voltage is almost unaffected by these parameters. Hole conductor free perovskite solar cells are used in this work, in order to minimize other possible effects. This study provides better understanding and control over the perovskite deposition through highly efficient, low-cost perovskite-based solar cells.

Cohen, Bat-El; Gamliel, Shany; Etgar, Lioz, E-mail: lioz.etgar@mail.huji.ac.il [Institute of Chemistry, Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem 90400 (Israel)

2014-08-01T23:59:59.000Z

383

Integrated inorganic membrane electrode assembly with layered double hydroxides as ionic conductors for anion exchange membrane water electrolysis  

Science Journals Connector (OSTI)

Abstract In this work, we report a novel integrated inorganic membrane electrode assembly (I2MEA) for anion exchange membrane (AEM) water electrolysis by using inorganic Mg-Al layered double hydroxides (Mg-Al LDHs) as an ionic conductor. Mg-Al \\{LDHs\\} synthesized by a two-step approach exhibit high hydroxide ion conductivity and superior stability. The resultant ionic conducting nanoparticles are cold-pressed to form a membrane and mixed with a non-precious electrocatalyst to form the catalyst layer onto each side of the membrane. As such, an I2MEA is formed and used in a water electrolysis setup. It is shown that the present water electrolysis results in a maximum current density of 208 mA cm?2 with 0.1 M NaOH as the electrolyte and a cutoff voltage of 2.2 V at 70 °C. More impressively, using 0.1 M Na2CO3 as the electrolyte, the \\{I2MEAs\\} can continuously electrolyze at 80 mA cm?2 for 600 hours with a decay rate of as low as 100 ?V h?1. This superior stability is attributed to the integrated structure that allows hydroxide ions to transport smoothly.

L. Zeng; T.S. Zhao

2015-01-01T23:59:59.000Z

384

Performance of pancake coils of parallel co-wound Ag/BSCCO tape conductors in static and ramped magnetic fields  

SciTech Connect (OSTI)

Critical Currents are reported for several Ag/BSCCO single-pancake coils in static magnetic fields ranging from 0 to 5 T and temperatures from 4.2 K to 105 K. The sample coils were co-wound of one to six tape conductors in parallel. Since the closed loops formed in such an arrangement could lead to eddy current heating or instability in changing fields, one of the coils was also tested in helium gas, in fields ramped at rates of up to 1.5 T/s. For these quasi-adiabatic tests, at each temperature the transport current was set just below the critical value for a preset static field of 3.3 or 4.9 T. The field was then rapidly ramped down to zero, held for 20 sec, and then ramped back up to the original value. The maximum observed temperature transient of about 1.7 K occurred at 9 K, for a field change of 4.75 T. The temperature transients became negligible when the sample was immersed in liquid helium. Above 30 K, the transients were below 1 K. These results give confidence that parallel co-wound HTSC coils are stable in a rapidly-ramped magnetic field, without undue eddy current heating.

Schwenterly, S.W.; Lue, J.W.; Lubell, M.S. [Oak Ridge National Lab., TN (United States); Walker, M.S.; Hazelton, D.W.; Haldar, P.; Rice, J.A.; Hoehn, J.G. Jr.; Motowidlo, L.R. [Intermagnetics General Corp., Latham, NY (United States)

1994-12-31T23:59:59.000Z

385

Much simplified ion-beam assisted deposition-TiN template for high-performance coated conductors  

SciTech Connect (OSTI)

A much simplified template, i.e., two nonsuperconducting layers between the superconducting YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) and the polycrystalline metal substrate, has been developed for high-performance coated conductors by using biaxially aligned TiN as a seed layer. A combination of a thin TiN ({approx}10 nm by ion-beam assisted deposition) layer and an epitaxial buffer LaMnO{sub 3} layer ({approx}120 nm) allows us to grow epitaxial YBCO films with values of full width at half-maximum around 3.5 deg. and 1.7 deg. for the {phi}-scan of (103) and rocking curve of (005) YBCO, respectively. The YBCO films grown on electropolished polycrystalline Hastelloy using this two-layer template exhibited a superconducting transition temperature of 89.5 K, a critical current density of 1.2 MA/cm{sup 2} at 75.5 K, and an {alpha} value (proportional factor of critical current density J{sub c}{approx}H{sup -}{alpha}) of around 0.33, indicating a high density of pinning centers and an absence of weak links.

Xiong, J. [Division of Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); State Key Lab of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China); Matias, V.; Zhai, J. Y.; Maiorov, B.; Trugman, D.; Jia, Q. X. [Division of Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Wang, H. [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843-3128 (United States); Tao, B. W.; Li, Y. R. [State Key Lab of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

2010-10-15T23:59:59.000Z

386

Incorporation of a risk analysis approach for the nuclear fuel cycle advanced transparency framework.  

SciTech Connect (OSTI)

Proliferation resistance features that reduce the likelihood of diversion of nuclear materials from the civilian nuclear power fuel cycle are critical for a global nuclear future. A framework that monitors process information continuously can demonstrate the ability to resist proliferation by measuring and reducing diversion risk, thus ensuring the legitimate use of the nuclear fuel cycle. The automation of new nuclear facilities requiring minimal manual operation makes this possible by generating instantaneous system state data that can be used to track and measure the status of the process and material at any given time. Sandia National Laboratories (SNL) and the Japan Atomic Energy Agency (JAEA) are working in cooperation to develop an advanced transparency framework capable of assessing diversion risk in support of overall plant transparency. The ''diversion risk'' quantifies the probability and consequence of a host nation diverting nuclear materials from a civilian fuel cycle facility. This document introduces the details of the diversion risk quantification approach to be demonstrated in the fuel handling training model of the MONJU Fast Reactor.

Mendez, Carmen Margarita (Sociotecnia Solutions, LLC); York, David L.; Inoue, Naoko (Japan Atomic Energy Agency); Kitabata, Takuya (Japan Atomic Energy Agency); Vugrin, Eric D.; Vugrin, Kay White; Rochau, Gary Eugene; Cleary, Virginia D.

2007-05-01T23:59:59.000Z

387

U.S. Transparency monitoring under the U.S./Russian HEU purchase agreement  

SciTech Connect (OSTI)

The conversion of Highly Enriched Uranium (HEU) metal to low enriched uranium (LEU) takes place at four Russian sites. HEU metal to oxide processing began in 1994 with shipments of HEU oxide from the Siberian Chemical Enterprise (SChE) to the Ural Electrochemical Integrated Plant (UEIP) fluorination and blending facility. U.S. transparency monitoring at these facilities began in February 1996. In 1996, fluorination and blending operations began at the Electrochemical Plant (ECP). In 1997, additional HEU metal to oxide was added at the Mayak Production Association (MPA), and additional fluorination and blending operations have been performed at SChE. U.S. transparency monitoring at these facilities is intended to provide confidence that HEU weapons components are received, that the HEU metal is converted to HEU oxide, and that the HEU is blended to LEU prior to shipment to the U.S. Enrichment Corporation (USEC). The monitoring begins with observation of HEU weapon components in sealed containers, including confirmation of the {sup 235}U enrichment using U.S. nondestructive assay (NDA) equipment. The feeding of HEU metal shavings to the oxidation process and the subsequent packaging of the HEU oxide for shipment to the fluorination and blending facilities are then monitored. At those facilities, monitors are allowed to witness the fluorination and blending of the HEU into LEU. Monitors are allowed to use the NDA instrumentation to confirm that HEU is being processed. A series of process and material accountancy documents are provided to U.S. monitors.

Benton, J; Dougherth, D R; Glaser, J W; Thomas, D C

1999-07-27T23:59:59.000Z

388

Deployment of the National Transparent Optical Network around the San Francisco Bay Area  

SciTech Connect (OSTI)

We report on the deployment and initial operation of the National Transparent Optical Network, an experimental WDM network testbed around the San Francisco Bay Area, during the Optical Fiber Conference (OFC`96) held in San Jose, CA. The deployment aspects of the physical plant, optical and SONET layers are examined along with a discussion of broadband applications which utilized the network during the OFC`96 demonstration. The network features dense WDM technology, transparent optical routing technology using acousto- optic tunable filter based switches, and network modules with add/drop, multicast, and wavelength translation capabilities. The physical layer consisted of over 300 km of Sprint and Pacific Bell conventional single mode fiber which was amplified with I I optical amplifiers deployed in pre-amp, post-amp, and line amp configurations. An out-of-band control network provided datacom channels from remote equipment sites to the SONET network manager deployed at the San Jose Convention Center for the conference. Data transport over five wavelengths was achieved in the 1550 nm window using a variety of signal formats including analog and digital signal transmission on different wavelengths on the same fiber. The network operated throughout the week of OFC`96 and is still in operation today.

McCammon, K.; Haigh, R.; Armstrong, G. [and others

1996-06-01T23:59:59.000Z

389

Report to Congress on the Use of the Waste Isolation Pilot Plant to Develop and Demonstrate Transparency Technologies  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the the Use of the Waste Isolation Pilot Plant to Develop and Demonstrate Transparency Technologies Introduction This report describes the Department of Energy's plan for evaluating the use of the Waste Isolation Pilot Plant (WIPP) repository system to develop transparency technologies. This report fulfills the requirement of Senate Report 106-50 on the National Defense Authorization Act for Fiscal Year 2000 for the Department of Energy (DOE) to develop a plan to establish a nuclear waste disposal demonstration test bed facility. Congressional Request In Report 106-50 the Senate Armed Services Committee directed DOE to develop a plan to establish a demonstration and training program using the WIPP repository system as a test bed facility to develop transparent monitoring technologies for waste storage

390

Atomic Physics Effects on Convergent, Child-Langmuir Ion Flow between Nearly Transparent Electrodes  

SciTech Connect (OSTI)

Research during this project at the University of Wisconsin Fusion Technology Institute (UW FTI) on ion and neutral flow through an arbitrary, monotonic potential difference created by nearly transparent electrodes accomplished the following: (1) developed and implemented an integral equation approach for atomic physics effects in helium plasmas; (2) extended the analysis to coupled integral equations that treat atomic and molecular deuterium ions and neutrals; (3) implemented the key deuterium and helium atomic and molecular cross sections; (4) added negative ion production and related cross sections; and (5) benchmarked the code against experimental results. The analysis and codes treat the species D0, D20, D+, D2+, D3+, D and, separately at present, He0 and He+. Extensions enhanced the analysis and related computer codes to include He++ ions plus planar and cylindrical geometries.

Santarius, John F. [University of Wisconsin-Madison] [University of Wisconsin-Madison; Emmert, Gilbert A. [University of Wisconsin-Madison] [University of Wisconsin-Madison

2013-11-07T23:59:59.000Z

391

Improving transparency: extracting, visualising and analysing corporate relationships from SEC 10-K documents  

Science Journals Connector (OSTI)

We present a system to extract, visualise and analyse inter-corporation relationships disclosed by public companies in their annual reports to the US Securities and Exchange Commission (SEC). In improving the transparency of these disclosures, we allow policymakers, analysts, investors and the general public to analyse these relationships at both the firm level and the industry level. Using probabilistic information retrieval and extraction techniques, we automatically extract a dataset of 45,000 relationships between 26,000 companies from over 15 GB of SEC 10-K documents. These relationships range from ownerships, agreements and personal connections to competition and legal disagreements. Information visualisation and social network analytic techniques can then be applied to explore and analyse the dataset.

Michael Gebbie; Kim Norlen; Gabriel Lucas; John Chuang

2007-01-01T23:59:59.000Z

392

Two-phase flow visualization in a transparent, atmospheric pressure, boiling water loop  

SciTech Connect (OSTI)

The Simulant Boiling Flow Visualization (SBFV) loop, a transparent, atmospheric pressure test apparatus employing boiling water as a simulant for boiling liquid sodium, has been designed and operated at Oak Ridge National Laboratory. The objective of testing in this loop has been to study two-phase flow behavior that is phenomenologically similar to that observed in sodium boiling experiments, as part of the US Department of Energy Breeder Reactor Safety Program. A detailed description of the design of the SBFV loop is presented, as well as experimental results that show the similarity between low-power boiling behavior in water and liquid sodium. Future tests are planned in a seven-pin flow visualization bundle that will be installed in the SBFV loop. The design of this bundle is also discussed.

Levin, A.E.; Carbajo, J.J.; Montgomery, B.H.; Wantland, J.L.

1985-01-01T23:59:59.000Z

393

Line narrowing of electromagnetically induced transparency in Rb with a longitudinal magnetic field  

Science Journals Connector (OSTI)

Electromagnetically induced transparency (EIT) experiments in ?-type systems benefit from the use of hot vapor where the thermal averaging results in reducing the width of the EIT resonance well below the natural linewidth. Here, we demonstrate a technique for further reducing the EIT width in room-temperature vapor by the application of a small longitudinal magnetic field. The Zeeman shift of the energy levels results in the formation of several shifted subsystems; the net effect is to create multiple EIT dips each of which is significantly narrower than the original resonance. We observe a reduction by a factor of 3 in the D2 line of Rb87 with a field of 3.2G.

S. M. Iftiquar and Vasant Natarajan

2009-01-12T23:59:59.000Z

394

Calculation of the microscopic parameters of a self-induced transparency modelocked quantum cascade laser  

Science Journals Connector (OSTI)

A model to calculate the microscopic parameters of self-induced transparency (SIT) modelocked quantum cascade lasers (QCLs) is presented and the parameters are then calculated for a particular structure. These parameters are then used to calculate the gain to absorption ratio that is required to determine the required ratio of gain periods to absorbing periods that must be grown in order to obtain stable modelocked pulses. The modelocked pulse parameters, along with the stability limits are then calculated as the ratio of gain to absorption varies. For the SIT modelocked QCL design that we examined, we found that three to five gain periods must be grown for each absorbing period in order to ensure stable operation.

Muhammad Anisuzzaman Talukder; Curtis R. Menyuk

2013-01-01T23:59:59.000Z

395

Laser frequency stabilization to excited state transitions using electromagnetically induced transparency in a cascade system  

SciTech Connect (OSTI)

We demonstrate laser frequency stabilization to excited state transitions using cascade electromagnetically induced transparency. Using a room temperature Rb vapor cell as a reference, we stabilize a first diode laser to the D{sub 2} transition and a second laser to a transition from the intermediate 5P{sub 3/2} state to a highly excited state with principal quantum number n=19-70. A combined laser linewidth of 280{+-}50 kHz over a 100 {mu}s time period is achieved. This method may be applied generally to any cascade system and allows laser stabilization to an atomic reference in the absence of a direct absorption signal.

Abel, R. P.; Mohapatra, A. K.; Bason, M. G.; Pritchard, J. D.; Weatherill, K. J.; Raitzsch, U.; Adams, C. S. [Department of Physics, Durham University, Rochester Building, South Road, Durham DH1 3LE (United Kingdom)

2009-02-16T23:59:59.000Z

396

Resolution of hyperfine transitions in metastable 83Kr using Electromagnetically Induced Transparency  

E-Print Network [OSTI]

Narrow linewidth signals of Electromagnetically Induced Transparency (EIT) in the metastable 83Kr have been observed for the first time. Various hyperfine transitions in 4p55s[3/2]2 to 4p55p[5/2]3 manifolds of 83Kr have been identified through the experimentally observed EIT signals. Some unresolved or poorly resolved hyperfine transitions in saturated absorption spectroscopy (SAS) are clearly resolved in the present work. Using the spectral separation of these EIT identified hyperfine transitions, the magnetic hyperfine constant (A) and the electric quadrupole hyperfine constant (B) are determined with improved accuracy for 4p55s[3/2]2 and 4p55p[5/2]3 manifolds.

Kale, Y B; Tiwari, V B; Singh, S; Rawat, H S

2015-01-01T23:59:59.000Z

397

Transparent Conducting Electrodes based on 1D and 2D Ag Nanogratings for Organic Photovoltaics  

E-Print Network [OSTI]

The optical and electrical properties of optically-thin one-dimensional (1D) Ag nanogratings and two-dimensional (2D) Ag nanogrids are studied, and their use as transparent electrodes in organic photovoltaics are explored. A large broadband and polarization-insensitive optical absorption enhancement in the organic light-harvesting layers is theoretically and numerically demonstrated using either single-layer 2D Ag nanogrids or two perpendicular 1D Ag nanogratings, and is attributed to the excitation of surface plasmon resonances and plasmonic cavity modes. Total photon absorption enhancements of 150% and 200% are achieved for the optimized single-layer 2D Ag nanogrids and double (top and bottom) perpendicular 1D Ag nanogratings, respectively.

Zeng, Beibei; Bartoli, Filbert J

2014-01-01T23:59:59.000Z

398

Electromagnetically induced transparency and dark fluorescence in a cascade three-level diatomic lithium system  

Science Journals Connector (OSTI)

Following our previous brief report [Phys. Rev. Lett. 88, 173003 (2002)], we report here a detailed study of electromagnetically induced transparency (EIT) and dark fluorescence in a cascade three-level diatomic lithium system using optical-optical double resonance (OODR) spectroscopy for both resonance and off resonance coupling. When a strong coupling laser couples the intermediate state A?u+1(v=13,J=14) to the upper state G?g1(v=11,J=14) of Li27, the fluorescence from both A?u+1 and G?g1 states was drastically reduced as the weak probe laser was tuned through the resonance transition between the ground state X?g+1(v=4,J=15) and the excited state A?u+1(v=13,J=14). The strong coupling laser makes an optically thick medium transparent for the probe transition. In addition, the fact that fluorescence from the upper state G?g1(v=11,J=14) was also dark when both lasers were tuned at resonance implies that the molecules were trapped in the ground state. We used density matrix methods to simulate the response of an open molecular three-level system to the action of a strong coupling field and a weak probe field. The analytical solutions were obtained under the steady-state condition. We have incorporated the magnetic sublevel (M) degeneracy of the rotational levels in the line shape analysis and report ?M? dependent line shape splitting. Our theoretical calculations are in excellent agreement with the observed fluorescence spectra. We show that the coherence is remarkably preserved even when the coupling field was detuned far from the resonance.

Jianbing Qi and A. Marjatta Lyyra

2006-04-19T23:59:59.000Z

399

Improved photovoltaic performance of InGaN/GaN solar cells with optimized transparent current spreading layers  

Science Journals Connector (OSTI)

In0.135Ga0.865N/GaN p–i–n solar cells are fabricated and investigated with three types of transparent current spreading layers (TCSLs): Ni/Au layer type (Ni/Au-L), Ni/Au grid type (Ni/Au-G), and ITO layer type (I...

X. M. Cai; Y. Wang; Z. D. Li; X. Q. Lv; J. Y. Zhang; L. Y. Ying…

2013-05-01T23:59:59.000Z

400

Three-Dimensional Bicomponent Supramolecular Nanoporous Self-Assembly on a Hybrid All-Carbon Atomically Flat and Transparent Platform  

Science Journals Connector (OSTI)

Three-Dimensional Bicomponent Supramolecular Nanoporous Self-Assembly on a Hybrid All-Carbon Atomically Flat and Transparent Platform ... We thank Ueli Heiz for providing experimental infrastructure at the Institute of Physical Chemistry at TUM. ... electronics are based on conjugated systems predominantly made up of sp2-hybridized carbon, such as graphene nanoribbons. ...

Juan Li; Sarah Wieghold; Murat Anil Öner; Patrick Simon; Moritz V. Hauf; Emanuela Margapoti; Jose A. Garrido; Friedrich Esch; Carlos-Andres Palma; Johannes V. Barth

2014-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Co-sputtered Aluminum Doped Zinc Oxide Thin Film as Transparent Anode for Organic Light-emitting Diodes  

E-Print Network [OSTI]

Co-sputtered Aluminum Doped Zinc Oxide Thin Film as Transparent Anode for Organic Light and Technology, Clear Water Bay, Kowloon, Hong Kong, China ABSTRACT Aluminum doped zinc oxide (AZO that MTDATA matches better with AZO than CuPc, which served as hole injection layer. Keywords: Aluminum doped

402

Apparatus and procedure to characterize the surface quality of conductors by measuring the rate of cathode emission as a function of surface electric field strength  

DOE Patents [OSTI]

A device and method for characterizing quality of a conducting surface. The device including a gaseous ionizing chamber having centrally located inside the chamber a conducting sample to be tested to which a negative potential is applied, a plurality of anode or "sense" wires spaced regularly about the central test wire, a plurality of "field wires" at a negative potential are spaced regularly around the sense, and a plurality of "guard wires" at a positive potential are spaced regularly around the field wires in the chamber. The method utilizing the device to measure emission currents from the conductor.

Mestayer, Mac; Christo, Steve; Taylor, Mark

2014-10-21T23:59:59.000Z

403

Introduction of Artificial Pinning Center into PLD-YBCO Coated Conductor on IBAD and Self-Epitaxial CeO2 Buffered Metal Substrate  

SciTech Connect (OSTI)

In order to fabricate YBa2Cu3O7-x (YBCO) coated conductors with high critical current density Jc in magnetic fields, we fabricated YBCO coated conductors with artificial pinning centers by the pulsed laser deposition (PLD) method on a self epitaxial PLD-CeO2 layer and ion-beam assisted deposition (IBAD)-Gd2Zr2O7 (GZO) buffered Hastelloy tape. Artificial pinning centers were introduced by the PLD deposition using the yttria-stabilized zirconia (YSZ) oxide target (nano-dot method) and YBCO target including YSZ particles (mixed target method). In the experiments using YSZ oxide target, YSZ nano-dots were observed. They were approximately 15 nm in height and 10 nm to 70 nm in diameter. We found that the density of nano-dots was controlled by the number of laser pulses. These samples exhibited higher Jc than YBCO films in magnetic fields. Furthermore, a similar improvement of Jc was observed in the experiments using YBCO target including YSZ particles. TEM observation revealed that columnar nano-structure made of BaZrO3 was formed during YBCO deposition and it was effective for pinning. We call this new epitaxial nano-structure 'bamboo structure' from its anisotropic growth and morphology.

Kobayashi, H.; Yamada, Y.; Ishida, S.; Takahashi, K.; Konishi, M.; Ibi, A.; Miyata, S. [Superconductivity Research Laboratory, ISTEC, 2-4-1 Mutsuno, Atsuta-ku, Nagoya, 456-8587 (Japan); Kato, T.; Hirayama, T. [Materials R and D Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587 (Japan); Shiohara, Y. [Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062 (Japan)

2006-03-31T23:59:59.000Z

404

A transparent Pyrex ?-reactor for combined in situ optical characterization and photocatalytic reactivity measurements  

SciTech Connect (OSTI)

A new Pyrex-based ?-reactor for photocatalytic and optical characterization experiments is presented. The reactor chamber and gas channels are microfabricated in a thin poly-silicon coated Pyrex chip that is sealed with a Pyrex lid by anodic bonding. The device is transparent to light in the UV-vis-near infrared range of wavelengths (photon energies between ?0.4 and ?4.1 eV). The absorbance of a photocatalytic film obtained with a light transmission measurement during a photocatalytic reaction is presented as a proof of concept of a photocatalytic reactivity measurement combined with in situ optical characterization. Diffuse reflectance measurements of highly scattering photocatalytic nanopowders in a sealed Pyrex ?-reactor are also possible using an integrating sphere as shown in this work. These experiments prove that a photocatalyst can be characterized with optical techniques after a photocatalytic reaction without removing the material from the reactor. The catalyst deposited in the cylindrical reactor chamber can be illuminated from both top and bottom sides and an example of application of top and bottom illumination is presented.

Dionigi, F.; Hansen, O. [CINF, Department of Physics, Building 312, Fysikvej, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark) [CINF, Department of Physics, Building 312, Fysikvej, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark); Department of Micro- and Nanotechnology, Nanotech, Building 345 East, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark); Nielsen, M. G.; Chorkendorff, I.; Vesborg, P. C. K. [CINF, Department of Physics, Building 312, Fysikvej, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark)] [CINF, Department of Physics, Building 312, Fysikvej, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark); Pedersen, T. [Department of Micro- and Nanotechnology, Nanotech, Building 345 East, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark)] [Department of Micro- and Nanotechnology, Nanotech, Building 345 East, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark)

2013-10-15T23:59:59.000Z

405

Improving Transparency in the Reporting of Safeguards Implementation: FY11 Update  

SciTech Connect (OSTI)

In 2008, the Standing Advisory Group on Safeguards Implementation (SAGSI) indicated that the International Atomic Energy Agency's (IAEA) Safeguards Implementation Report (SIR) has not kept pace with the evolution of safeguards and provided the IAEA with a set of recommendations for improvement. The SIR is the primary mechanism for providing an overview of safeguards implementation in a given year and reporting on the annual safeguards findings and conclusions drawn by the Secretariat. As the IAEA transitions to State-level safeguards approaches, SIR reporting must adapt to reflect these evolutionary changes. This evolved report will better reflect the IAEA's transition to a more qualitative and information-driven approach, based upon State-as-a-whole considerations. This paper applies SAGSI's recommendations to the development of multiple models for an evolved SIR and finds that an SIR repurposed as a 'safeguards portal' could significantly enhance information delivery, clarity, and transparency. In addition, this paper finds that the 'portal concept' also appears to have value as a standardized information presentation and analysis platform for use by Country Officers, for continuity of knowledge purposes, and the IAEA Secretariat in the safeguards conclusion process. Accompanying this paper is a fully functional prototype of the 'portal' concept, built using commercial software and IAEA Annual Report data and available for viewing at http://safeguardsportal.pnnl.gov.

Toomey, Christopher; Odlaug, Christopher S.; Wyse, Evan T.

2011-09-30T23:59:59.000Z

406

Low-resistivity photon-transparent window attached to photo-sensitive silicon detector  

DOE Patents [OSTI]

The invention comprises a combination of a low resistivity, or electrically conducting, silicon layer that is transparent to long or short wavelength photons and is attached to the backside of a photon-sensitive layer of silicon, such as a silicon wafer or chip. The window is applied to photon sensitive silicon devices such as photodiodes, charge-coupled devices, active pixel sensors, low-energy x-ray sensors and other radiation detectors. The silicon window is applied to the back side of a photosensitive silicon wafer or chip so that photons can illuminate the device from the backside without interference from the circuit printed on the frontside. A voltage sufficient to fully deplete the high-resistivity photosensitive silicon volume of charge carriers is applied between the low-resistivity back window and the front, patterned, side of the device. This allows photon-induced charge created at the backside to reach the front side of the device and to be processed by any circuitry attached to the front side. Using the inventive combination, the photon sensitive silicon layer does not need to be thinned beyond standard fabrication methods in order to achieve full charge-depletion in the silicon volume. In one embodiment, the inventive backside window is applied to high resistivity silicon to allow backside illumination while maintaining charge isolation in CCD pixels.

Holland, Stephen Edward (Hercules, CA)

2000-02-15T23:59:59.000Z

407

Studies on transparent spinel magnesium indium oxide thin films prepared by chemical spray pyrolysis  

Science Journals Connector (OSTI)

Ternary semiconducting oxide compound magnesium indium oxide films (MgIn2O4), manifesting high transparency were prepared by metal organic chemical spray pyrolysis technique. Precursors prepared for various cationic ratios of Mg/In = 0.35, 0.40, 0.45 and 0.50 were thermally sprayed onto quartz substrates, decomposed at 450 °C and the spinel phase evolution was studied. X-ray diffraction, Rutherford backscattering and X-ray photoelectron spectroscopy studies have been conducted to confirm the formation of single-phase MgIn2O4 films with Mg/In ratio 0.50. From optical transmission studies, the observed optical band gaps varied from 3.18 to 3.86 eV (0.35 < Mg/In < 0.5). The electrical conductivity variations of these films were measured in the temperature range between 30 and 150 °C by four-probe technique (34.07–1.44 × 10? 5 S cm? 1) and the Hall coefficient showed n-type electrical conduction and high carrier concentration (0.16 × 1020–0.89 × 17 cm? 3).

A. Moses Ezhil Raj; V. Senthilkumar; V. Swaminathan; Joachim Wollschläger; M. Suendorf; M. Neumann; M. Jayachandran; C. Sanjeeviraja

2008-01-01T23:59:59.000Z

408

A narrow window of Rabi frequency for competition between electromagnetically induced transparency and Raman absorption  

SciTech Connect (OSTI)

This investigation clarifies the transition phenomenon between the electromagnetically induced transparency (EIT) and Raman absorption in a ladder-type system of Doppler-broadened cesium vapor. A competition window of this transition was found to be as narrow as 2 MHz defined by the probe Rabi frequency. For a weak probe, the spectrum of EIT associated with quantum interference suggests that the effect of the Doppler velocity on the spectrum is negligible. When the Rabi frequency of the probe becomes comparable with the effective decay rate, an electromagnetically induced absorption (EIA) dip emerges at the center of the power broadened EIT peak. While the Rabi frequency of the probe exceeds the effective decay rate, decoherence that is generated by the intensified probe field occurs and Raman absorption dominates the interaction process, yielding a pure absorption spectrum; the Doppler velocity plays an important role in the interaction. A theory that is based on density matrix simulation, with or without the Doppler effect, can qualitatively fit the experimental data. In this work, the coherence of atom-photon interactions is created or destroyed using the probe Rabi frequency as a decoherence source.

Chang, Ray-Yuan; Fang, Wei-Chia; Lee, Ming-Tsung; He, Zong-Syun; Ke, Bai-Cian [Department of Physics, National Cheng-Kung University, Tainan 70101, Taiwan (China); Lee, Yi-Chi [Institute of Electro-Optical Science and Engineering, National Cheng-Kung University, Tainan 70101, Taiwan (China); Tsai, Chin-Chun [Department of Physics, National Cheng-Kung University, Tainan 70101, Taiwan (China); Institute of Electro-Optical Science and Engineering, National Cheng-Kung University, Tainan 70101, Taiwan (China)

2010-01-15T23:59:59.000Z

409

Autler-Townes triplet absorption spectroscopy, controllable electromagnetically induced transparency and nonlinear coherence Kerr effect  

E-Print Network [OSTI]

A Field Generated Coherence (FGC)' based 3-field cyclically-driven 4-level atomic system, which is an extended version of $\\Lambda$ type schemes, is investigated for Autler-Townes Triplet (ATT) absorption spectroscopy. Two dark lines which appear in the ATT spectrum, are the essence of the generated multiple controllable Electromagnetically Induced Transparency (EIT) windows for a superluminal Gaussian light pulse. We also investigate enhancement in the group advance time for a probe superluminal Gaussian light pulse even with no additional losses while generating nonlinear coherence Kerr effect through an intense monochrmatic laser field. Consequently, the pulse leaves the steep anomalous region of the medium by $38 \\mu s$ sooner than the pulse when retrieved from the Kerr-free system. A co-linear propagation of the driving fields is suggested to minimize our explored incoherence Doppler broadening effect on the probe pulse. Indeed, the analytically observed undistorted retrieved Gaussian light pulse, which is a necessary and useful requirement for realization of the results in laboratory, is also shown and analyzed explicitly.

Bakht Amin Bacha; Fazal Ghafoor; Rashid G Nazmidinov

2014-01-09T23:59:59.000Z

410

Linear and nonlinear light propagations in a Doppler-broadened medium via electromagnetically induced transparency  

SciTech Connect (OSTI)

We present a systematic theoretical study to deal with linear and nonlinear light propagations in a Doppler-broadened three-level {Lambda} system via electromagnetically induced transparency (EIT), with incoherent population exchange between two lower energy levels taken into account. Through a careful analysis of base state and linear excitation, we show that the EIT condition of the system is given by |{Omega}{sub c}|{sup 2{gamma}}{sub 31}>>2{gamma}{sub 21{Delta}{omega}D}{sup 2}, where {Omega}{sub c} is half the Rabi frequency of the control field, {Delta}{omega}{sub D} is the Doppler width, and {gamma}{sub jl} is the decay rate of the coherence between states |j> and |l>. Under this condition, the effect of incoherent population exchange is insignificant, while dephasing dominates the decoherence of the system. This condition also ensures the validity of the weak nonlinear perturbation theory used in this work for solving the Maxwell-Bloch equations with inhomogeneous broadening. We then investigate the nonlinear propagation of the probe field and show that it is possible to form temporal optical solitons in the Doppler-broadened medium. Such solitons have ultraslow propagating velocity and can be generated in very low light power. The possibility of realizing (1+1)-dimensional and (2+1)-dimensional spatial optical solitons in the adiabatic regime of the system is also discussed.

Li Liang; Huang Guoxiang [Department of Physics and Institute of Theoretical Physics, East China Normal University, Shanghai 200062 (China); State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China and Institute of Nonlinear Physics, Zhejiang Normal University, Zhejiang 321004 (China)

2010-08-15T23:59:59.000Z

411

Structural stability of transparent conducting films assembled from length purified single-wall carbon nanotubes  

SciTech Connect (OSTI)

Single-wall carbon nanotube (SWCNT) films show significant promise for transparent electronics applications that demand mechanical flexibility, but durability remains an outstanding issue. In this work, thin membranes of length purified single-wall carbon nanotubes (SWCNTs) are uniaxially and isotropically compressed by depositing them on prestrained polymer substrates. Upon release of the strain, the topography, microstructure, and conductivity of the films are characterized using a combination of optical/fluorescence microscopy, light scattering, force microscopy, electron microscopy, and impedance spectroscopy. Above a critical surface mass density, films assembled from nanotubes of well-defined length exhibit a strongly nonlinear mechanical response. The measured strain dependence reveals a dramatic softening that occurs through an alignment of the SWCNTs normal to the direction of prestrain, which at small strains is also apparent as an anisotropic increase in sheet resistance along the same direction. At higher strains, the membrane conductivities increase due to a compression-induced restoration of conductive pathways. Our measurements reveal the fundamental mode of elasto-plastic deformation in these films and suggest how it might be suppressed.

J. M. Harris; G. R. S. Iyer; D. O. Simien; J. A. Fagan; J. Y. Huh; J. Y. Chung; S. D. Hudson; J. Obrzut; J. F. Douglas; C. M. Stafford; E. K. Hobbie

2011-01-01T23:59:59.000Z

412

See-through amorphous silicon solar cells with selectively transparent and conducting photonic crystal back reflectors for building integrated photovoltaics  

SciTech Connect (OSTI)

Thin semi-transparent hydrogenated amorphous silicon (a-Si:H) solar cells with selectively transparent and conducting photonic crystal (STCPC) back-reflectors are demonstrated. Short circuit current density of a 135?nm thick a-Si:H cell with a given STCPC back-reflector is enhanced by as much as 23% in comparison to a reference cell with an ITO film functioning as its rear contact. Concurrently, solar irradiance of 295?W/m{sup 2} and illuminance of 3480 lux are transmitted through the cell with a given STCPC back reflector under AM1.5 Global tilt illumination, indicating its utility as a source of space heating and lighting, respectively, in building integrated photovoltaic applications.

Yang, Yang [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada)] [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); O’Brien, Paul G. [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada) [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada); Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Ozin, Geoffrey A., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Kherani, Nazir P., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada)

2013-11-25T23:59:59.000Z

413

Nuclear correlation and finite interaction-range effects in high-energy $(e,e'p)$ nuclear transparency  

E-Print Network [OSTI]

Nuclear transparency is calculated for high-energy, semi-inclusive $(e,e'p)$ reactions, by accounting for all orders of Glauber multiple-scattering and by using realistic finite-range $p N$ interaction and (dynamically and statistically) correlated nuclear wave functions. The nuclear correlation effect is reduced due to the $p N$ finite-range effect. The net effect is small, and depends sensitively on details of the nuclear correlations in finite nuclei, which are poorly known at present.

Ryoichi Seki; T. D. Shoppa; Akihisa Kohama; Koichi Yazaki

1995-12-06T23:59:59.000Z

414

Integral energy performance characterization of semi-transparent photovoltaic elements for building integration under real operation conditions  

Science Journals Connector (OSTI)

Abstract In this paper, a methodology for the integral energy performance characterization (thermal, daylighting and electrical behavior) of semi-transparent photovoltaic modules (STPV) under real operation conditions is presented. An outdoor testing facility to analyze simultaneously thermal, luminous and electrical performance of the devices has been designed, constructed and validated. The system, composed of three independent measurement subsystems, has been operated in Madrid with four prototypes of a-Si STPV modules, each one corresponding to a specific degree of transparency. The extensive experimental campaign, continued for a whole year rotating the modules under test, has validated the reliability of the testing facility under varying environmental conditions. The thermal analyses show that both the solar protection and insulating properties of the laminated prototypes are lower than those achieved by a reference glazing whose characteristics are in accordance with the Spanish Technical Building Code. Daylighting analysis shows that STPV elements have an important lighting energy saving potential that could be exploited through their integration with strategies focused to reduce illuminance values in sunny conditions. Finally, the electrical tests show that the degree of transparency is not the most determining factor that affects the conversion efficiency.

L. Olivieri; E. Caamaño-Martin; F .Olivieri; J. Neila

2014-01-01T23:59:59.000Z

415

Nuclear transparency and effective kaon-nucleon cross section from the A(e, e'K+) reaction  

E-Print Network [OSTI]

We have determined the transparency of the nuclear medium to kaons from $A(e,e^{'} K^{+})$ measurements on $^{12}$C, $^{63}$Cu, and $^{197}$Au targets. The measurements were performed at the Jefferson Laboratory and span a range in four-momentum-transfer squared Q$^2$=1.1 -- 3.0 GeV$^2$. The nuclear transparency was defined as the ratio of measured kaon electroproduction cross sections with respect to deuterium, ($\\sigma^{A}/\\sigma^{D}$). We further extracted the atomic number ($A$) dependence of the transparency as parametrized by $T= (A/2)^{\\alpha-1}$ and, within a simple model assumption, the in-medium effective kaon-nucleon cross sections. The effective cross sections extracted from the electroproduction data are found to be smaller than the free cross sections determined from kaon-nucleon scattering experiments, and the parameter $\\alpha$ was found to be significantly larger than those obtained from kaon-nucleus scattering. We have included similar comparisons between pion- and proton-nucleon effective cross sections as determined from electron scattering experiments, and pion-nucleus and proton-nucleus scattering data.

Nuruzzaman; D. Dutta; J. Arrington; R. Asaturyan; F. Benmokhtar; W. Boeglin; P. Bosted; A. Bruell; B. Clasie; M. E. Christy; E. Chudakov; M. M. Dalton; A. Daniel; D. Day; L. El Fassi; R. Ent; H. C. Fenker; J. Ferrer; N. Fomin; H. Gao; K. Garrow; D. Gaskel; C. Gray; T. Horn; G. M. Huber; M. K. Jones; N. Kalantarians; C. E. Keppel; K. Kramer; Y. Li; Y. Liang; A. F. Lung; S. Malace; P. Markowitz; A. Matsumura; D. G. Meekins; T. Mertens; T. Miyoshi; H. Mkrtchyan; R. Monson; T. Navasardyan; G. Niculescu; I. Niculescu; Y. Okayasu; A. K. Opper; C. Perdrisat; V. Punjabi; X. Qian; A. W. Rauf; V. M. Rodriquez; D. Rohe; J. Seely; E. Segbefia; G. R. Smith; M. Sumihama; V. Tadevosyan; L. Tang; V. Tvaskis; W. F. Vulcan; F. R. Wesselmann; S. A. Wood; L. Yuan; X. C. Zheng

2011-08-02T23:59:59.000Z

416

A low-cost X-ray-transparent experimental cell for synchrotron-based X-ray microtomography studies under geological reservoir conditions  

Science Journals Connector (OSTI)

An X-ray-transparent experimental environment that allows time-resolved studies of porous rocks under geological reservoir conditions using high-energy synchrotron X-ray microtomography is presented.

Fusseis, F.

2013-12-05T23:59:59.000Z

417

A development strategy for connecting first-world consumers to third-world producers : integrating value chain transparency into E-commerce design  

E-Print Network [OSTI]

Value chain transparency, such as publishing member biographies and profit distribution, can be a powerful tool in increasing consumer trust and consumer loyalty. This thesis provides a methodology for integrating value ...

Dossa, Zahir (Zahir A.)

2010-01-01T23:59:59.000Z

418

Generation of high-energy vacuum UV femtosecond pulses by multiple-beam cascaded four-wave mixing in a transparent solid  

Science Journals Connector (OSTI)

The generation of ultrashort vacuum UV (VUV) pulses by nondegenerate cascaded four-wave mixing of femtosecond pulses in a thin slide of a large band-gap transparent solid is...

Silva, João L; Crespo, Helder M; Weigand, Rosa

2011-01-01T23:59:59.000Z

419

Optimization of transparent and reflecting electrodes for amorphous silicon solar cells. Final technical report  

SciTech Connect (OSTI)

Transparent conducting fluorine doped zinc oxide was deposited as thin films on soda lime glass substrates by atmospheric pressure chemical vapor deposition (CVD) at substrate temperatures of 460 to 500 degrees C. The precursors diethylzinc, tetramethylethylenediamine and benzoyl fluoride were dissolved in xylene. This solution was nebulized ultrasonically and then flash vaporized by a carrier gas of nitrogen preheated to 150 degrees C. Ethanol was vaporized separately, and these vapors were then mixed to form a homogeneous vapor mixture. Good reproducibility was achieved using this new CVD method. Uniform thicknesses were obtained by moving the heated glass substrates through the deposition zone. The best electrically and optical properties were obtained when the precursor solution was aged for more than a week before use. The films were polycrystalline and highly oriented with the c-axis perpendicular to the substrate. More than 90% of the incorporated fluorine atoms were electrically active as n-type dopants. The electrical resistivity of the films was as low as 5 x 10/sup -4/ Omega cm. The mobility was about 45 cm ²/Vs. The electron concentration was up to 3 x 10 %sup20;/cm³. The optical absorption of the films was about 3-4% at a sheet resistance of 7 ohms/square. The diffuse transmittance was about 10% at a wavelength of 650 nm. Amorphous ilicon solar cells were deposited using the textured fluorine doped zinc oxide films as a front electrode. The short circuit current was increased over similar cells made with fluorine doped tin oxide, but the open circuit voltages and fill factors were reduced. The voltage was restored by overcoating the fluorine-doped zinc oxide with a thin layer of fluorine-doped tin oxide.

Gordon, R.G.; Kramer, K.; Liang, H.; Liu, X.; Pang, D.; Teff, D.

1998-09-01T23:59:59.000Z

420

Streamlined life cycle assessment of transparent silica aerogel made by supercritical drying  

Science Journals Connector (OSTI)

When developing sustainable building fabric technologies, it is essential that the energy use and CO2 burden arising from manufacture does not outweigh the respective in-use savings. This study investigates this paradigm by carrying out a streamlined life cycle assessment (LCA) of silica aerogel. This unique, nanoporous translucent insulation material has the lowest thermal conductivity of any solid, retaining up to four times as much heat as conventional insulation, whilst being highly transparent to light and solar radiation. Monolithic silica aerogel has been cited as the ‘holy grail’ of future glazing technology. Alternatively, translucent granular aerogel is now being produced on a commercial scale. In each case, many solvents are used in production, often accompanied by intensive drying processes, which may consume large amounts of energy and CO2. To date, there has been no peer-reviewed LCA of this material conducted to the ISO 14000 standard. Primary data for this ‘cradle-to-factory gate’ LCA is collected for silica aerogel made by low and high temperature supercritical drying. In both cases, the mass of raw materials and electricity usage for each process is monitored to determine the total energy use and CO2 burden. Findings are compared against the predicted operational savings arising from retrofitting translucent silica aerogel to a single glazed window to upgrade its thermal performance. Results should be treated as a conservative estimate as the aerogel is produced in a laboratory, which has not been developed for mass manufacture or refined to reduce its environmental impact. Furthermore, the samples are small and assumptions to upscale the manufacturing volume occur without major changes to production steps or equipment used. Despite this, parity between the CO2 burden and CO2 savings is achieved in less than 2 years, indicating that silica aerogel can provide a measurable environmental benefit.

Mark Dowson; Michael Grogan; Tim Birks; David Harrison; Salmaan Craig

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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421

Predicting optical and thermal characteristics of transparent single-glazed domed skylights  

SciTech Connect (OSTI)

Optical and thermal characteristics of domed skylights are important to solve the trade-off between daylighting and thermal design. However, there is a lack of daylighting and thermal design tools for domed skylights. Optical and thermal characteristics of transparent single-glazed hemispherical domed skylights under sun and sky light are evaluated based on an optical model for domed skylights. The optical model is based on tracing the beam and diffuse radiation transmission through the dome surface. A simple method is proposed to replace single-glazed hemispherical domed skylights by optically and thermally equivalent single-glazed planar skylights to accommodate limitations of energy computer programs. Under sunlight, single-glazed hemispherical domed skylights yield slightly lower equivalent solar transmittance and solar heat gain coefficient (SHGC) at near normal zenith angles than those of single-glazed planar skylights. However, single-glazed hemispherical domed skylights yield substantially higher equivalent solar transmittance and SHGC at high zenith angles and around the horizon. Under isotropic skylight, single-glazed hemispherical domed skylights yield slightly lower equivalent solar transmittance and SHGC than those of single-glazed planar skylights. Daily solar heat gains of single-glazed hemispherical domed skylights are higher than those of single-glazed horizontal planar skylights in both winter and summer. In summer, the solar heat gain of single-glazed hemispherical domed skylights can reach 3% to 9% higher than those of horizontal single-glazed planar skylights for latitudes varying between 0 and 55{degree} (north/south). In winter, however, the solar heat gains of single-glazed hemispherical domed skylights increase significantly with the increase of the site latitude and can reach 232% higher than those of horizontal single-glazed planar skylights, particularly for high latitude countries.

Laouadi, A.; Atif, M.R.

1999-07-01T23:59:59.000Z

422

Ultralight, ultrastiff mechanical metamaterials  

Science Journals Connector (OSTI)

...microscale structures (42, 43). In contrast to other three-dimensional (3D) rapid prototyping methods such as 3D printing and ultraviolet (UV) projection waveguide systems (44), this type of fabrication technology is ideal for 3D lattices...

Xiaoyu Zheng; Howon Lee; Todd H. Weisgraber; Maxim Shusteff; Joshua DeOtte; Eric B. Duoss; Joshua D. Kuntz; Monika M. Biener; Qi Ge; Julie A. Jackson; Sergei O. Kucheyev; Nicholas X. Fang; Christopher M. Spadaccini

2014-06-20T23:59:59.000Z

423

Active Terahertz Metamaterial Devices  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Embodiments are described in which the MM elements incorporated within a Quantum Cascade Laser (QCL) to provide surface emitting (SE) properties. U.S. Patent No.: 7,826,504...

424

Nanosecond quantum molecular dynamics simulations of the lithium superionic conductor Li4?xGe1?xPxS4  

Science Journals Connector (OSTI)

The microscopic origin of high conductivity at room temperatures in lithium superionic conductors has remained a fundamental unsolved problem, although the recent discovery of Li10GeP2S12 was a great step toward the application of solid electrolytes. We achieve long-time (2-ns) tight-binding molecular dynamics simulations of Li4?xGe1?xPxS4 and observe the diffusion process where lithium atoms collectively hop into neighboring lithium sites by kicking the lithium atoms occupying these sites out. Furthermore, it is found that excess lithium atoms or doped lithium vacancies trigger a new diffusion process and drastically reduce the activation energy. We discuss the dynamic properties of lithium atoms in these materials, such as the diffusion constant, the activation energy, and the diffusion path.

Shinya Nishino; Takeo Fujiwara; Hisatsugu Yamasaki

2014-07-18T23:59:59.000Z

425

Metamaterial lens of specifiable frequency-dependent focus and adjustable aperture for electron cyclotron emission in the DIII-D tokamak  

E-Print Network [OSTI]

Electron Cyclotron Emission (ECE) of different frequencies originates at different locations in non-uniformly magnetized plasmas. For simultaneous observation of multiple ECE frequencies from the outside edge of a toroidal plasma confinement device (e.g. a tokamak), the focal length of the collecting optics should increase with the frequency to maximize the resolution on a line of sight along the magnetic field gradient. Here we present the design and numerical study of a zoned metamaterial lens with such characteristics, for possible deployment with the 83-130 GHz ECE radiometer in the DIII-D tokamak. The lens consists of a concentric array of miniaturized element phase-shifters. These were reverse-engineered starting from the desired Gaussian beam waist locations and further optimized to account for diffraction and finite-aperture effects that tend to displace the waist. At the same time we imposed high and uniform transmittance, averaged over all phase-shifters. The focal length is shown to increase from 1...

Hammond, K C; Massidda, S D; Volpe, F A

2014-01-01T23:59:59.000Z

426

Glass and glass-ceramics transparent from the visible range to the mid-infrared for night vision  

Science Journals Connector (OSTI)

Many papers report studies on oxyfluorides glass-ceramics combining the optical advantage of fluoride environment for rare earth with the thermal and chemical advantages of oxide glasses [1â??7], or on oxide-based glass-ceramics exhibiting exceptional thermo-mechanical properties such as zero thermal expansion coefficient. The transparency of these glass-ceramics is limited in the infrared region up to 4 µm [8â??12]. In this paper, we report the last results on totally new infrared transmitting chalcogenide glass-ceramics which are transparent up to 11 µm for sulphur based glass or up to 16 µm for selenium based glass. By selecting appropriate glass composition in several Ge-(Sb/Ga)-(S/Se)-MX (MX: alkali halide) systems, glass-ceramics with different microcrystals volume fraction can be reproducibly obtained by controlling nucleation and crystallisation annealing time and temperatures. It has been demonstrated that crystals smaller than 200 nm induce some additional losses only in the short wavelength region. The glass ceramics keep the same transmission as the original glass from 1 µm up to 11 µm or 16 µm. Sulphur based glass-ceramics are still transparent in the second for glass and selenium based glass-ceramics keep an excellent transmission in the second and third atmospheric window. The obtained glass-ceramics exhibit much better resistance to cracks propagation than the corresponding pure glass matrix. Observations under electronic microscopy as well as X-ray diffraction have been used to determinate crystals size, density and crystalline phase. The possibility of combining the ceramisation process and the shaping by moulding has also been demonstrated.

L. Calvez; H-L. Ma; J. Lucas; X.H. Zhang

2008-01-01T23:59:59.000Z

427

Fabrication of highly transparent diamond-like carbon anti-reflecting coating for Si solar cell application  

SciTech Connect (OSTI)

ARC grade highly transparent unhydrogenated diamond-like carbon (DLC) films were produced, directly from a-C target, using RF magnetron sputtering deposition technique, for optoelectronic applications. Optical band gap, transmittance, reflectance, sp{sup 3} fraction, I{sub D}/I{sub G}, density, and refractive index of the films have been estimated with the help of optical tools like Uv-vis spectrophotometer, ellipsometer and micro-Raman. Optimum ARC-qualities have been identified in low-temperature grown DLC films at an Ar pressure of 4 mTorr in the reactor, accomplishing its key requirements for use in silicon solar cells.

Banerjee, Amit, E-mail: erdd@iacs.res.in; Das, Debajyoti, E-mail: erdd@iacs.res.in [Nano-Science Group, Energy Research Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032 (India)

2014-04-24T23:59:59.000Z

428

GaN nanorod light emitting diodes with suspended graphene transparent electrodes grown by rapid chemical vapor deposition  

SciTech Connect (OSTI)

Ordered and dense GaN light emitting nanorods are studied with polycrystalline graphene grown by rapid chemical vapor deposition as suspended transparent electrodes. As the substitute of indium tin oxide, the graphene avoids complex processing to fill up the gaps between nanorods and subsequent surface flattening and offers high conductivity to improve the carrier injection. The as-fabricated devices have 32% improvement in light output power compared to conventional planar GaN-graphene diodes. The suspended graphene remains electrically stable up to 300?°C in air. The graphene can be obtained at low cost and high efficiency, indicating its high potential in future applications.

Xu, Kun; Xu, Chen, E-mail: xuchen58@bjut.edu.cn; Deng, Jun; Zhu, Yanxu; Guo, Weiling; Mao, Mingming; Xun, Meng; Chen, Maoxing; Zheng, Lei [Key Laboratory of Optoelectronics Technology, Beijing University of Technology, Ministry of Education, Beijing 100124 (China)] [Key Laboratory of Optoelectronics Technology, Beijing University of Technology, Ministry of Education, Beijing 100124 (China); Xie, Yiyang [State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductor, Chinese Academy of Sciences, Beijing 100083 (China)] [State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductor, Chinese Academy of Sciences, Beijing 100083 (China); Sun, Jie, E-mail: jie.sun@chalmers.se [Key Laboratory of Optoelectronics Technology, Beijing University of Technology, Ministry of Education, Beijing 100124 (China) [Key Laboratory of Optoelectronics Technology, Beijing University of Technology, Ministry of Education, Beijing 100124 (China); Mikroteknologi och Nanovetenskap, Chalmers Tekniska Högskola AB, Göteborg 41296 (Sweden)

2013-11-25T23:59:59.000Z

429

Three-photon near-infrared quantum cutting in Tm{sup 3+}-doped transparent oxyfluoride glass ceramics  

SciTech Connect (OSTI)

Efficient three-step sequential three-photon near-infrared (NIR) quantum cutting in Tm{sup 3+}-doped transparent oxyfluoride glass ceramics has been demonstrated, where an absorbed blue photon could be cut into three NIR photons at 1190, 1460, and 1800 nm with quantum yield greater than unity. On the basis of static and dynamic photoemission, monitored excitation, and time-resolved fluorescence spectra, we investigate in detail the underlying optoelectronic mechanism. Further development of an efficient triply-cutting material might open up a path towards ultra-efficient photonic devices, which enables more photons emitted than absorbed in the excitation process.

Yu, D. C.; Zhang, J. P.; Chen, Q. J.; Zhang, W. J.; Yang, Z. M.; Zhang, Q. Y. [State Key Laboratory of Luminescence Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641 (China)

2012-10-22T23:59:59.000Z

430

Application of Developed APCVD Transparent Conducting Oxides and Undercoat Technologies for Economical OLED Lighting  

SciTech Connect (OSTI)

Economics is a key factor for application of organic light emitting diodes (OLED) in general lighting relative to OLED flat panel displays that can handle high cost materials such as indium tin oxide (ITO) or Indium zinc oxide (IZO) as the transparent conducting oxide (TCO) on display glass. However, for OLED lighting to penetrate into general illumination, economics and sustainable materials are critical. The issues with ITO have been documented at the DOE SSL R&D and Manufacturing workshops for the last 5 years and the issue is being exaserbated by export controls from China (one of the major sources of elemental indium). Therefore, ITO is not sustainable because of the fluctuating costs and the United States (US) dependency on other nations such as China. Numerous alternatives to ITO/IZO are being evaluated such as Ag nanoparticles/nanowires, carbon nanotubes, graphene, and other metal oxides. Of these other metal oxides, doped zinc oxide has attracted a lot of attention over the last 10 years. The volume of zinc mined is a factor of 80,000 greater than indium and the US has significant volumes of zinc mined domestically, resulting in the ability for the US to be self-sufficient for this element that can be used in optoelectonic applications. The costs of elemental zinc is over 2 orders of magnitude less than indium, reflecting the relative abundance and availablility of the elements. Arkema Inc. and an international primary glass manufacturing company, which is located in the United States, have developed doped zinc oxide technology for solar control windows. The genesis of this DOE SSL project was to determine if doped zinc oxide technology can be taken from the commodity based window market and translate the technology to OLED lighting. Thus, Arkema Inc. sought out experts, Philips Lighting, Pacific Northwest National Laboratories (PNNL) and National Renewable Research Laboratories (NREL), in OLED devices and brought them into the project. This project had a clear focus on economics and the work plan focused both on doped ZnO process and OLED device structure that would be consistent with the new TCO. The team successfully made 6 inch OLEDs with a serial construction. More process development is required to optimize commercial OLED structures. Feasibility was demonstrated on two different light extraction technologies: 1/4 lambda refractive index matching and high-low-high band pass filter. Process development was also completed on the key precursors for the TCO, which are ready for pilot-plant scale-up. Subsequently, Arkema has developed a cost of ownership model that is consistent with DOE SSL R&D Manufacturing targets as outlined in the DOE SSL R&D Manufacturing 2010 report. The overall outcome of this project was the demonstration that doped zinc oxide can be used for OLED devices without a drop-off in performance while gaining the economic and sustainable benefits of a more readily available TCO. The broad impact of this project, is the facilitation of OLED lighting market penetration into general illumination, resulting in significant energy savings, decreased greenhouse emissions, with no environmental impact issues such as mercury found in Fluorescent technology.

Gary Silverman; Bluhm, Martin; Coffey, James; Korotkov, Roman; Polsz, Craig; Salemi, Alexandre; Smith, Robert; Smith, Ryan; Stricker, Jeff; Xu,Chen; Shirazi, Jasmine; Papakonstantopulous, George; Carson, Steve Philips Lighting GmbH Goldman, Claudia; Hartmann, Sören; Jessen, Frank; Krogmann, Bianca; Rickers, Christoph; Ruske, Manfred, Schwab, Holger; Bertram, Dietrich

2011-01-02T23:59:59.000Z

431

Application of Developed APCVD Transparent Conducting Oxides and Undercoat Technologies for Economical OLED Lighting  

SciTech Connect (OSTI)

Economics is a key factor for application of organic light emitting diodes (OLED) in general lighting relative to OLED flat panel displays that can handle high cost materials such as indium tin oxide (ITO) or Indium zinc oxide (IZO) as the transparent conducting oxide (TCO) on display glass. However, for OLED lighting to penetrate into general illumination, economics and sustainable materials are critical. The issues with ITO have been documented at the DOE SSL R&D and Manufacturing workshops for the last 5 years and the issue is being exacerbated by export controls from China (one of the major sources of elemental indium). Therefore, ITO is not sustainable because of the fluctuating costs and the United States (US) dependency on other nations such as China. Numerous alternatives to ITO/IZO are being evaluated such as Ag nanoparticles/nanowires, carbon nanotubes, graphene, and other metal oxides. Of these other metal oxides, doped zinc oxide has attracted a lot of attention over the last 10 years. The volume of zinc mined is a factor of 80,000 greater than indium and the US has significant volumes of zinc mined domestically, resulting in the ability for the US to be self-sufficient for this element that can be used in optoelectronic applications. The costs of elemental zinc is over 2 orders of magnitude less than indium, reflecting the relative abundance and availability of the elements. Arkema Inc. and an international primary glass manufacturing company, which is located in the United States, have developed doped zinc oxide technology for solar control windows. The genesis of this DOE SSL project was to determine if doped zinc oxide technology can be taken from the commodity based window market and translate the technology to OLED lighting. Thus, Arkema Inc. sought out experts, Philips Lighting, Pacific Northwest National Laboratories (PNNL) and National Renewable Research Laboratories (NREL), in OLED devices and brought them into the project. This project had a clear focus on economics and the work plan focused both on doped ZnO process and OLED device structure that would be consistent with the new TCO. The team successfully made 6 inch OLEDs with a serial construction. More process development is required to optimize commercial OLED structures. Feasibility was demonstrated on two different light extraction technologies: 1/4 lambda refractive index matching and high-low-high band pass filter. Process development was also completed on the key precursors for the TCO, which are ready for pilot-plant scale-up. Subsequently, Arkema has developed a cost of ownership model that is consistent with DOE SSL R&D Manufacturing targets as outlined in the DOE SSL R&D Manufacturing 2010 report. The overall outcome of this project was the demonstration that doped zinc oxide can be used for OLED devices without a drop-off in performance while gaining the economic and sustainable benefits of a more readily available TCO. The broad impact of this project, is the facilitation of OLED lighting market penetration into general illumination, resulting in significant energy savings, decreased greenhouse emissions, with no environmental impact issues such as mercury found in Fluorescent technology. The primary objective of this project was to develop a commercially viable process for 'Substrates' (Substrate/ undercoat/ TCO topcoat) to be used in production of OLED devices (lamps/luminaries/modules). This project focused on using Arkema's recently developed doped ZnO technology for the Fenestration industry and applying the technology to the OLED lighting industry. The secondary objective was the use of undercoat technology to improve light extraction from the OLED device. In optical fields and window applications, technology has been developed to mitigate reflection losses by selecting appropriate thicknesses and refractive indices of coatings applied either below or above the functional layer of interest. This technology has been proven and implemented in the fenestration industry for more than 15 years. Successful completion of

Martin Bluhm; James Coffey; Roman Korotkov; Craig Polsz; Alexandre Salemi; Robert Smith; Ryan Smith; Jeff Stricker; Chen Xu; Jasmine Shirazi; George Papakonstantopulous; Steve Carson; Claudia Goldman; Soren Hartmann; Frank Jessen; Bianca Krogmann; Christoph Rickers; Manfred Ruske; Holger Schwab; Dietrich Bertram

2011-01-02T23:59:59.000Z

432

Supporting the President's Arms Control and Nonproliferation Agenda: Transparency and Verification for Nuclear Arms Reductions  

SciTech Connect (OSTI)

The President's arms control and nonproliferation agenda is still evolving and the details of initiatives supporting it remain undefined. This means that DOE, NNSA, NA-20, NA-24 and the national laboratories can help define the agenda, and the policies and the initiatives to support it. This will require effective internal and interagency coordination. The arms control and nonproliferation agenda is broad and includes the path-breaking goal of creating conditions for the elimination of nuclear weapons. Responsibility for various elements of the agenda will be widely scattered across the interagency. Therefore an interagency mapping exercise should be performed to identify the key points of engagement within NNSA and other agencies for creating effective policy coordination mechanisms. These can include informal networks, working groups, coordinating committees, interagency task forces, etc. It will be important for NA-20 and NA-24 to get a seat at the table and a functional role in many of these coordinating bodies. The arms control and nonproliferation agenda comprises both mature and developing policy initiatives. The more mature elements such as CTBT ratification and a follow-on strategic nuclear arms treaty with Russia have defined milestones. However, recent press reports indicate that even the START follow-on strategic arms pact that is planned to be complete by the end of 2009 may take significantly longer and be more expansive in scope. The Russians called for proposals to count non-deployed as well as deployed warheads. Other elements of the agenda such as FMCT, future bilateral nuclear arms reductions following a START follow-on treaty, nuclear posture changes, preparations for an international nuclear security summit, strengthened international safeguards and multilateral verification are in much earlier stages of development. For this reason any survey of arms control capabilities within the USG should be structured to address potential needs across the near-term (1-4) years and longer-term (5-10) years planning horizons. Some final observations include acknowledging the enduring nature of several key objectives on the Obama Administration's arms control and nonproliferation agenda. The CTBT, FMCT, bilateral nuclear arms reductions and strengthening the NPT have been sought by successive U.S. Administrations for nearly thirty years. Efforts towards negotiated arms control, although de-emphasized by the G.W. Bush Administration, have remained a pillar of U.S. national security strategy for decades and are likely to be of enduring if not increasing importance for decades to come. Therefore revitalization and expansion of USG capabilities in this area can be a positive legacy no matter what near-term arms control goals are achieved over the next four years. This is why it is important to reconstruct integrated bureaucratic, legislative, budgetary and diplomatic strategies to sustain the arms control and nonproliferation agenda. In this endeavor some past lessons must be taken to heart to avoid bureaucratic overkill and keep interagency policy-making and implementation structures lean and effective. On the Technical side a serious, sustained multilateral program to develop, down select and performance test nuclear weapons dismantlement verification technologies and procedures should be immediately initiated. In order to make this happen the United States and Russia should join with the UK and other interested states in creating a sustained, full-scale research and development program for verification at their respective nuc1ear weapons and defense establishments. The goals include development of effective technologies and procedures for: (1) Attribute measurement systems to certify nuclear warheads and military fissile materials; (2) Chain-of-custody methods to track items after they are authenticated and enter accountability; (3) Transportation monitoring; (4) Storage monitoring; (5) Fissile materials conversion verification. The remainder of this paper focuses on transparency and verification for nuclear arms a

Doyle, James E [Los Alamos National Laboratory; Meek, Elizabeth [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

433

Dielectric-wall linear accelerator with a high voltage fast rise time switch that includes a pair of electrodes between which are laminated alternating layers of isolated conductors and insulators  

DOE Patents [OSTI]

A dielectric-wall linear accelerator is improved by a high-voltage, fast rise-time switch that includes a pair of electrodes between which are laminated alternating layers of isolated conductors and insulators. A high voltage is placed between the electrodes sufficient to stress the voltage breakdown of the insulator on command. A light trigger, such as a laser, is focused along at least one line along the edge surface of the laminated alternating layers of isolated conductors and insulators extending between the electrodes. The laser is energized to initiate a surface breakdown by a fluence of photons, thus causing the electrical switch to close very promptly. Such insulators and lasers are incorporated in a dielectric wall linear accelerator with Blumlein modules, and phasing is controlled by adjusting the length of fiber optic cables that carry the laser light to the insulator surface. 12 figs.

Caporaso, G.J.; Sampayan, S.E.; Kirbie, H.C.

1998-10-13T23:59:59.000Z

434

The investigation of interactions between single walled carbon nanotubes and flexible chain molecules  

E-Print Network [OSTI]

Anisotropic nanoparticles, such as inorganic nanowires and carbon nanotubes, are promising materials for a wide range of technological applications including transparent conductors, thin film transistors, photovoltaic ...

Jeng, Esther Shu-Hsien

2010-01-01T23:59:59.000Z

435

Solar Energy Systems - Research - Systems Analysis - Smart Grid...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Energy Systems U.S. Department of Energy Search Argonne ... Search Argonne Home > SES Home Research Home Photovoltaics Transparent Conductors Concentrating Sunlight Systems...

436

Diameter-Refined Metallic Carbon Nanotubes as Optically Tunable...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Diameter-Refined Metallic Carbon Nanotubes as Optically Tunable Transparent Conductors Home > Research > ANSER Research Highlights > Diameter-Refined Metallic Carbon Nanotubes as...

437

Combined Neutron and Synchrotron X-ray Diffraction Investigation of the BaCe0.85-xZrxY0.15O3-? (0.1 ? x ? 0.4) Proton Conductors  

Science Journals Connector (OSTI)

Combined Neutron and Synchrotron X-ray Diffraction Investigation of the BaCe0.85-xZrxY0.15O3-? (0.1 ? x ? 0.4) Proton Conductors ... § Laboratory for Neutron Scattering, ETHZ and PSI, CH-5232, Villigen PSI, Switzerland ... Combined neutron and X-ray synchrotron diffraction have been used to unveil the structural properties for the BaCe0.85-xZrxY0.15O3-? ...

Lorenzo Malavasi; Cristina Tealdi; Clemens Ritter; Vladimir Pomjakushin; Fabia Gozzo; Yuri Diaz-Fernandez

2011-02-03T23:59:59.000Z

438

Electromagnetically induced transparency inside the laser cavity: Switch between first-order and second-order phase transitions  

E-Print Network [OSTI]

Electromagnetically induced transparency inside the laser cavity: Switch between first-order and second-order phase transitions Qingqing Sun,1,2 M. Selim Shahriar,3 and M. Suhail Zubairy1,2 1Department of Physics and Institute of Quantum Studies.... #1;b#2; The level structure for the three-level atoms. SUN, SHAHRIAR, AND ZUBAIRY PHYSICAL REVIEW A 78, 013805 #1;2008#2; 013805-2 #6;?ca = ? #1;i#11;ca + #12;ca#2;#6;ca + i2 #5;e i #5;ei#4;#5;t#1;#6;aa ? #6;cc#2; ? i#1;baE#1; 2#8; ei#4;t#6;cb...

Sun, Qingqing; Shahriar, M. Selim; Zubairy, M. Suhail

2008-01-01T23:59:59.000Z

439

Methods of forming aluminum oxynitride-comprising bodies, including methods of forming a sheet of transparent armor  

DOE Patents [OSTI]

The invention includes methods of forming an aluminum oxynitride-comprising body. For example, a mixture is formed which comprises A:B:C in a respective molar ratio in the range of 9:3.6-6.2:0.1-1.1, where "A" is Al.sub.2O.sub.3, "B" is AlN, and "C" is a total of one or more of B.sub.2O.sub.3, SiO.sub.2, Si--Al--O--N, and TiO.sub.2. The mixture is sintered at a temperature of at least 1,600.degree. C. at a pressure of no greater than 500 psia effective to form an aluminum oxynitride-comprising body which is at least internally transparent and has at least 99% maximum theoretical density.

Chu, Henry Shiu-Hung [Idaho Falls, ID; Lillo, Thomas Martin [Idaho Falls, ID

2008-12-02T23:59:59.000Z

440

Effect of the thickness and hydrogen treatment on the properties of Ga-doped ZnO transparent conductive films  

Science Journals Connector (OSTI)

Combined effects of the thickness and hydrogen post-annealing treatment on the structural, electrical, and optical properties of Ga-doped ZnO (GZO) films were investigated as a potential substitute for indium tin oxide transparent conductive oxide. In the as-deposited films, microstructural evolution initially improved the crystallinity up to the thickness of 160 nm accompanying enhanced electrical and optical properties, but further thickness increase resulted in the deterioration of these properties attributable to the development of ZnGa2O4 and Ga2O3 phases originating from the excessive amount of the Ga dopant. Post-annealing treatment of the GZO films in a hydrogen atmosphere improved the electrical and optical properties substantially through possible reduction of the oxide phases and passivation of the surfaces and grain boundaries. In this case, electrical and optical properties remained almost similar for the thickness above 160 nm indicating that there exists a certain optimal film thickness.

Min-Jung Lee; Jinhyong Lim; Jungsik Bang; Woong Lee; Jae-Min Myoung

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Chapter 14 - Does Asia Really have Poorer Governance? Evidence from International Variations in Self-Dealing Transparency  

Science Journals Connector (OSTI)

Abstract Prior literature contending that corporate governance in Asia is poor ignores disclosure of self-dealing. This chapter overcomes this deficiency as it examines the determinants of measures against self-dealing in corporate activity in 60 countries, focusing especially on Asian countries controlling for national culture and economic variables. We document that higher self-dealing transparency is positively associated with the Asian region other poorer aspects of governance. We also find that governance disclosure is negatively associated with uncertainty avoidance and positively associated with an English legal origin and greater economic inequality. Given that the Asian region has often been regarded as having poorer governance, our study will be of considerable interest to managers and policy makers.

Raj Aggarwal; John W. Goodell

2014-01-01T23:59:59.000Z

442

Time-resolved electron thermal conduction by probing of plasma formation in transparent solids with high power subpicosecond laser pulses  

SciTech Connect (OSTI)

This dissertation work includes a series of experimental measurements in a search for better understanding of high temperature (10{sup 4}-10{sup 6}K) and high density plasmas (10{sup 22}-10{sup 24}cm{sup {minus}3}) produced by irradiating a transparent solid target with high intensity (10{sup 13} - 10{sup 15}W/cm{sup 2}) and subpicosecond (10{sup {minus}12}-10{sup {minus}13}s) laser pulses. Experimentally, pump and probe schemes with both frontside (vacuum-plasma side) and backside (plasma-bulk material side) probes are used to excite and interrogate or probe the plasma evolution, thereby providing useful insights into the plasma formation mechanisms. A series of different experiments has been carried out so as to characterize plasma parameters and the importance of various nonlinear processes. Experimental evidence shows that electron thermal conduction is supersonic in a time scale of the first picosecond after laser irradiation, so fast that it was often left unresolved in the past. The experimental results from frontside probing demonstrate that upon irradiation with a strong (pump) laser pulse, a thin high temperature ({approximately}40eV) super-critical density ({approximately}10{sup 23}/cm{sup 3}) plasma layer is quickly formed at the target surface which in turn becomes strongly reflective and prevents further transmission of the remainder of the laser pulse. In the bulk region behind the surface, it is also found that a large sub-critical ({approximately}10{sup 18}/cm{sup 3}) plasma is produced by inverse Bremsstrahlung absorption and collisional ionization. The bulk underdense plasma is evidenced by large absorption of the backside probe light. A simple and analytical model, modified from the avalanche model, for plasma evolution in transparent materials is proposed to explain the experimental results. Elimination of the bulk plasma is then experimentally illustrated by using targets overcoated with highly absorptive films.

Vu, B.T.V.

1994-02-01T23:59:59.000Z

443

Comparative study of the thermal and power performances of a semi-transparent photovoltaic façade under different ventilation modes  

Science Journals Connector (OSTI)

Abstract This paper studied the thermal and power performances of a ventilated photovoltaic façade under different ventilation modes, and appropriate operation strategies for different weather conditions were proposed accordingly to maximize its energy conversion efficiency. This ventilated PV double-skin façade (PV-DSF) consists of an outside layer of semi-transparent amorphous silicon (a-Si) PV laminate, an inward-openable window and a 400 mm airflow cavity. Before installation, the electrical characteristics under standard testing conditions (STC) and the temperature coefficients of the semi-transparent PV module were tested and determined in the laboratory. Field measurements were carried out to investigate the impact of different ventilation modes, namely, ventilated, buoyancy-driven ventilated and non-ventilated, on the thermal and power performances of this PV-DSF. The results show that the ventilated PV-DSF provides the lowest average solar heat gain coefficient (SHGC) and the non-ventilated PV-DSF provides the best thermal insulation performance. In terms of power performance, the energy output of the ventilated PV-DSF is greater than those of the buoyancy-driven ventilated and non-ventilated PV-DSFs by 1.9% and 3%, respectively, due to its much lower operating temperature. Based on the experimental results, a conclusion was drawn that the ventilation design can not only reduce the heat gain of PV-DSF but also improve the energy conversion efficiency of PV modules by bringing down their operating temperature. In addition, an optimum operation strategy is recommended for this kind of PV-DSF to maximize its overall energy efficiency under different weather conditions.

Jinqing Peng; Lin Lu; Hongxing Yang; Tao Ma

2014-01-01T23:59:59.000Z

444

335Nanostructured ZnO and ZAO transparent thin films by sputteringsurface characterization Corresponding author: M. Suchea, e-mail: mirasuchea@iesl.forth.gr  

E-Print Network [OSTI]

as transparent electrode in solar cells and flat panel displays as well as for the fabrication of gratings as candidate materials for organic electroluminescence displays [5]. Furthermore, as expected, the physi- cal [8]. Many deposition techniques [1,3,4] have been applied for the production of ZnO films in order

445

Preparation of Highly Transparent TiO2-based Thin Film Photocatalysts by an Ion Engineering Method: Ionized Cluster Beam Deposition  

Science Journals Connector (OSTI)

Highly transparent TiO2 and TiO2-based binary oxide (TiO2/SiO2 and TiO2/B2O3) thin films of different TiO2 contents were successfully prepared by using an ion engineering technique as a dry process. These transpa...

Masato Takeuchi; Masakazu Anpo

2010-01-01T23:59:59.000Z

446

Novel chemically stable Ba3Ca1.18Nb1.82-xYxO9- proton conductor: improved proton conductivity through tailored cation ordering  

SciTech Connect (OSTI)

Simple perovskite-structured proton conductors encounter significant challenges to simultaneously achieving excellent chemical stability and proton conductivity that are desirable for many important applications in energy conversion and storage. This work demonstrates that Y-doped complex-perovskite-structured Ba3Ca1.18Nb1.82 xYxO9 materials possess both improved proton conductivity and exceptional chemical stability. Neutron powder diffraction refinement revealed a Fm3 m perovskite-structure and increased oxygen vacancy concentration due to the Y doping. High-resolution TEM analysis confirmed the perturbation of the B site cation ordering in the structure for the Ba3Ca1.18Nb1.82 xYxO9 materials. Such combined effects led to improved proton conductivity with a value of 5.3 10 3 S cm 1 at 600 C for Ba3Ca1.18Nb1.52Y0.3O9 (BCNY0.3), a value 2.4 times higher compared with that of the undoped Ba3Ca1.18Nb1.82O9 . The Ba3Ca1.18Nb1.82 xYxO9 materials showed remarkable chemical stability toward water and demonstrated no observable reactions to CO2 exposure. Ionic transport number studies showed that BCNY0.3 had predominantly proton conduction below 600 C. Solid oxide fuel cells using BCNY0.3 as an electrolyte demonstrated cell power output of 103 mW cm 2 at 750 C. These results suggest that a doping strategy that tailors the cation ordering in complex perovskites provides a new direction in the search for novel proton conducting ceramics.

Wang, Siwei [University of South Carolina, Columbia] [University of South Carolina, Columbia; Chen, Yan [ORNL] [ORNL; Fang, Shumin [University of South Carolina, Columbia] [University of South Carolina, Columbia; Zhang, Lingling [University of South Carolina, Columbia] [University of South Carolina, Columbia; Tang, Ming [Los Alamos National Laboratory (LANL)] [Los Alamos National Laboratory (LANL); An, Ke [ORNL] [ORNL; Brinkman, Dr. Kyle S. [Savannah River National Laboratory (SRNL), Aiken, S.C.] [Savannah River National Laboratory (SRNL), Aiken, S.C.; Chen, Fanglin [University of South Carolina, Columbia] [University of South Carolina, Columbia

2014-01-01T23:59:59.000Z

447

COMPUTATIONAL MODELING, SYNTHESIS, AND CHARACTERIZATION OF BaZr1-xYxO3-8 SOLID STATE PROTON CONDUCTOR  

SciTech Connect (OSTI)

During the second semiannual period we have carried out a series of QM calculations on the BaZr{sub 1-x}Y{sub x}H{sub x}O{sub 3} proton conductor to determine the equilibrium proton positions and corresponding energies. We find that the size of the crystal cell is very important for the identification of the equilibrium proton positions. To derive ReaxFF parameters for Pt-surfaces and for H-transfer in Y-doped BaZrO{sub 3}, we carried out QM-calculations on the structures and energies of relevant condensed phases and cluster systems. These data then served as a training set to optimize the ReaxFF parameters. ReaxFF for various bulk metals (Pt, Zr, and Y) and metal clusters (Pt) was developed. BaZr{sub 1-x}Y{sub x}O{sub 3-{delta}} with x = 0.2, 0.3, 0.4, 0.5 was synthesized using a modified Pechini method and characterization (X-ray diffraction, scanning electron microscopy, and impedance spectroscopy) of this material was performed. We find that a single perovskite phase is formed in BaZr{sub 1-x}Y{sub x}O{sub 3-{delta}}. The proton conductivity of BaZr{sub 1-x}Y{sub x}O{sub 3-{delta}} with x = 0.5 is significantly lower than the conductivity of the samples with Y-dopant concentrations of 0.1 and 0.2.

Boris Merinov; Claudio O. Dorso; William A. Goddard III; Jian Wu; Sossina Haile

2003-10-30T23:59:59.000Z

448

Measurement of the 3D Born-Oppenheimer Potential of a Proton in a Hydrogen-Bonded System via Deep Inelastic Neutron Scattering: The Superprotonic Conductor Rb{sub 3}H(SO{sub 4}){sub 2}  

SciTech Connect (OSTI)

We report the first direct measurement of the proton 3-D Born-Oppenheimer potential in any material. The proton potential surfaces in the hydrogen-bonded superprotonic conductor Rb{sub 3}H(SO{sub 4}){sub 2} are extracted from the momentum distribution measured using Deep Inelastic Neutron Scattering (DINS). The potential has a single minimum along the bond direction, which accounts for the absence of the antiferroelectric transition seen in the deuterated material. The measured potential is in qualitative agreement with phenomenological double Morse potentials that have been used to describe hydrogen bonds in other systems.

Homouz, D.; Reiter, G. [Physics Department, University of Houston, Houston, Texas, 77204 (United States); Eckert, J. [LANSCE, Los Alamos National Laboratory, and University of California, Santa Barbara, California (United States); Mayers, J. [ISIS, Rutherford Appelton Laboratory, Chilton, Didcot, England (United Kingdom); Blinc, R. [Stefan Jozef Institut, Lubljana (Slovenia)

2007-03-16T23:59:59.000Z

449

Ingrain and grain boundary scattering effects on electron mobility of transparent conducting polycrystalline Ga-doped ZnO films  

SciTech Connect (OSTI)

Transparent conducting polycrystalline Ga-doped ZnO (GZO) films with different thicknesses were deposited on glass substrates at a substrate temperature of 200 deg. C by ion-plating deposition with direct current arc-discharge. The dependences of crystal structure, electrical, and optical properties of the GZO films on thickness have been systematically studied. Optical response due to free electrons of the GZO films was characterized in the photon energy range from 0.73 to 3.8 eV by spectroscopic ellipsometry (SE). The free electron response was expressed by the simple Drude model combined with the Tauc-Lorentz model. From the SE analysis and the results of Hall measurements, electron effective mass, m{sup *}, and optical mobility, {mu}{sub opt}, of the GZO films were determined, based on the assumptions that the films are homogeneous and optically isotropic. By comparing the {mu}{sub opt} and Hall mobility, {mu}{sub Hall}, an indication on the effect of ingrain and grain boundary scattering limiting the electron mobility has been obtained. Moreover, the variation in scattering mechanism causing thickness dependence of {mu}{sub Hall} was correlated with the development of polycrystalline grain structure.

Yamada, Takahiro; Makino, Hisao; Yamamoto, Naoki; Yamamoto, Tetsuya [Materials Design Center, Research Institute, Kochi University of Technology, 185 Miyanokuchi, Tosayamada-cho, Kami-shi, Kochi 782-8502 (Japan)

2010-06-15T23:59:59.000Z

450

Electromagnetically-induced-transparency plasmonics: Quantum-interference-assisted tunable surface-plasmon-polariton resonance and excitation  

Science Journals Connector (OSTI)

An experimentally feasible configuration of a prism coupler with an electromagnetically-induced-transparency (EIT) medium layer, e.g., a semiconductor-quantum-dot (SQD) medium, deposited upon its prism base is suggested for generating tunable surface-plasmon-polariton resonance. Such surface-plasmon-polariton resonance and optical excitation of a surface plasmon wave can be manipulated by switchable quantum interference among SQD multilevel transitions driven by two external control fields. When an incident probe field is coupled into a surface plasmon wave excitation mode, the surface-plasmon-polariton (SPP) resonance at the interface between the SQD medium layer and the substrate will arise, and the quantum-coherently controllable reflection spectrum of the probe field on the prism base can be achieved. In this process, destructive and constructive quantum interference (determined by the intensity ratio of the two external control fields) in the SQD multilevel system plays a key role for achieving the tunable reflection spectrum. The EIT-based surface-plasmon-polariton resonance presented here will have three characteristics (some of them would be attractive): (i) switchable quantum interference exhibited by surface plasmon wave excitation, (ii) quantum-coherently controllable surface plasmon polaritons by external optical fields, (iii) surface wave sensitive to dispersion of the SQD quantum coherent medium. Such an effect of controllable optical response based on the quantum-interference switchable surface-plasmon-polariton resonance in the EIT-prism coupler may find some potential applications in design of new photonic and quantum optical devices.

Jian Qi Shen

2014-08-11T23:59:59.000Z

451

nature nanotechnology | VOL 5 | AUGUST 2010 | www.nature.com/naturenanotechnology 559 news & views  

E-Print Network [OSTI]

devices, and as flexible transparent conductors for macroelectronic devices such as solar cells, display, the size of copper foil that can be practically placed into the CVD furnace. In general, an optically and solar cells require transparent conductors with both high optical transmission and low electrical

Chen, Yong P.

452

Solar heat gain coefficient measurement of semi-transparent photovoltaic modules with indoor calorimetric hot box and solar simulator  

Science Journals Connector (OSTI)

In tropical Singapore, buildings receive a high amount of solar radiation. Windows should therefore consist of solar control glazing with a low solar heat gain coefficient (SHGC) and high visible light transmittance to reduce the energy consumption for air-conditioning and electrical lighting respectively. Due to the rising demand for on-site electricity generation, photovoltaic modules are increasingly used in buildings, initially as roof-top systems, but in recent years there are also semi-transparent photovoltaic (STPV) being integrated into the façade or overhead glazing. However, their SHGC is usually not reported, potentially preventing STPV from widespread adoption. The paper presents measurements and novel presentations of SHGC for selected thin-film STPV glazing. It introduces SERIS’ indoor calorimetric hot box and solar simulator including a documentation of environmental conditions and calibrations. A sensitivity analysis concluded that the SHGC measurement is mainly sensitive to the spectrum of the solar simulator and reflection properties of the absorber plate. A correction factor was introduced and the measured results compare well with simulations. In addition, SHGC values for selected STPV are presented as (a) angular dependent and (b) load dependent. The results show that the SHGC is sensitive to the incident angle of solar radiation. Particularly for incident angles above 45°, which would be typical for facades in the tropics, the SHGC reduces significantly, compared to the default at 0°. The SHGC reduces only marginally when an electrical load is connected. Higher PV efficiencies would result in more energy being converted into electricity and not into re-radiating heat and therefore producing a lower SHGC.

Fangzhi Chen; Stephen K. Wittkopf; Poh Khai Ng; Hui Du

2012-01-01T23:59:59.000Z

453

Methods | Transparent Cost Database  

Open Energy Info (EERE)

information NREL has developed the following cost of energy tools: System Advisor Model (SAM): https:sam.nrel.gov SAM makes performance predictions and cost of...

454

Flexible and Transparent Memory  

E-Print Network [OSTI]

electrical characteristics under flex. (a) Normalized resistance vs.electrical characteristics under flex. (a) Normalized resistance vs.

KIM, SUNG MIN

2012-01-01T23:59:59.000Z

455

Transparent access to multiple  

E-Print Network [OSTI]

form for private use is permitted with- out payment of royalty provided that (1) each reproduction royalty free without further permission by computer-based and other information-service systems

Stevens, Robert

456

Identification of LAMBDA-like systems in Er{sup 3+}:Y{sub 2}SiO{sub 5} and observation of electromagnetically induced transparency  

SciTech Connect (OSTI)

Electromagnetically induced transparency (EIT) is reported in a solid-state material doped with erbium ions. In this paper we introduce the spectroscopic investigations we have conducted in order to identify the adequate LAMBDA-like three-level systems in Er{sup 3+}:Y{sub 2}SiO{sub 5} crystal, relevant for the demonstration of EIT. These results pave the way for nonlinear and quantum optics applications based on EIT at the telecom wavelength around 1.5 mum.

Baldit, E.; Bencheikh, K.; Monnier, P.; Briaudeau, S.; Levenson, J. A.; Crozatier, V.; Lorgere, I.; Bretenaker, F.; Le Goueet, J. L.; Guillot-Noeel, O.; Goldner, Ph. [Laboratoire de Photonique et de Nanstructures, CNRS-UPR 20, 91460 Marcoussis (France); Laboratoire Aime Cotton, CNRS-UPR 3321, University Paris-Sud, Bat. 505, 91405 Orsay Cedex (France); Laboratoire de Chimie de la Matiere Condensee de Paris, CNRS-UMR 7574, ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05 (France)

2010-04-01T23:59:59.000Z

457

Grain and Grain-Boundary Critical Currents in Coated Conductors with Non-Correlating YBa2Cu3O7 and Substrate Grain-Boundary Networks  

SciTech Connect (OSTI)

The superconducting grain-boundary (GB) network of coated conductors (CCs) is usually assumed to be a replica of the substrate network. In this letter, we analyze IBAD and RABITS CCs, where such replica either do or do not exist. We have analyzed the effect of GB overgrowth on the critical currents by quantifying the average superconducting grain size and determining the intragrain and grain-boundary critical current densities, J{sub c}{sup G} and J{sub c}{sup GB}. We have employed a recently developed inductive methodology enabling the simultaneous determination of these three parameters. We show that the percolative J{sub c}{sup GB} may be reduced by 50% if the GB networks do not correlate, while J{sub c}{sup G} and the grain pinning properties appear unaffected.

Palau, A. [ICMAB, Barcelona, Spain; Puig, T. [ICMAB, Barcelona, Spain; Obradors, X. [ICMAB, Barcelona, Spain; Feenstra, Roeland [ORNL; Gapud, Albert Agcaoili [ORNL; Specht, Eliot D [ORNL; Feldmann, D. M. [University of Wisconsin, Madison; Holesinger, T. G. [Los Alamos National Laboratory (LANL)

2006-01-01T23:59:59.000Z

458

Roughness-based monitoring of transparency and conductivity in boron-doped ZnO thin films prepared by spray pyrolysis  

SciTech Connect (OSTI)

Graphical abstract: Display Omitted Highlights: ? We report surface roughness dependent transparency and conductivity in ZnO films. ? The surface roughness with respected to boron doping concentrations is studied. ? Boron doped and pristine Zinc oxide thin films have showed ?95% transmittance. ? Increased carrier concentration of 9.21 × 10{sup 21} cm{sup ?3} revealed from Hall measurement. -- Abstract: Sprayed polycrystalline ZnO and boron-doped ZnO thin films composed of spherical grains of 25–32 nm in diameters are used in roughness measurement and further correlated with the transparency and the conductivity characteristics. The surface roughness is increased up to Zn{sub 0.98}B{sub 0.02}O and then declined at higher boron concentrations. The sprayed ZnO films revealed ?95% transmittance in the visible wavelength range, 1.956 × 10{sup ?4} ? cm electrical resistivity, 46 cm{sup 2}/V s Hall mobility and 9.21 × 10{sup 21} cm{sup ?3} charge carrier concentration. The X-ray photoelectron spectroscopy study has confirmed 0.15 eV binding energy change for Zn 2p{sub 3/2} when 2 at% boron content is mixed without altering electro-optical properties substantially. Finally, using soft modeling importance of these textured ZnO over non-textured films for enhancing the solar cells performance is explored.

Gaikwad, Rajendra S. [Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650 (Korea, Republic of) [Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650 (Korea, Republic of); Department of Physics, Yashwantrao Mohite College, Bharati Vidyapeeth Deemed University, Pune 411038, Maharashtra (India); Bhande, Sambhaji S. [Centre for Nanomaterials and Energy Devices, School of Physical Sciences, Swami Ramand Teerth Marathwada University, Nanded (India)] [Centre for Nanomaterials and Energy Devices, School of Physical Sciences, Swami Ramand Teerth Marathwada University, Nanded (India); Mane, Rajaram S., E-mail: rsmane_2000@yahoo.com [Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650 (Korea, Republic of); Inorganic Nanomaterials Laboratory, Department of Chemistry, Hanyang University, Seoul 133-791 (Korea, Republic of); Centre for Nanomaterials and Energy Devices, School of Physical Sciences, Swami Ramand Teerth Marathwada University, Nanded (India); Pawar, Bhagwat N. [Department of Physics, Yashwantrao Mohite College, Bharati Vidyapeeth Deemed University, Pune 411038, Maharashtra (India)] [Department of Physics, Yashwantrao Mohite College, Bharati Vidyapeeth Deemed University, Pune 411038, Maharashtra (India); Gaikwad, Sanjay L. [Centre for Nanomaterials and Energy Devices, School of Physical Sciences, Swami Ramand Teerth Marathwada University, Nanded (India)] [Centre for Nanomaterials and Energy Devices, School of Physical Sciences, Swami Ramand Teerth Marathwada University, Nanded (India); Han, Sung-Hwan [Inorganic Nanomaterials Laboratory, Department of Chemistry, Hanyang University, Seoul 133-791 (Korea, Republic of)] [Inorganic Nanomaterials Laboratory, Department of Chemistry, Hanyang University, Seoul 133-791 (Korea, Republic of); Joo, Oh-Shim, E-mail: jookat@kist.ac.kr [Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650 (Korea, Republic of)] [Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650 (Korea, Republic of)

2012-12-15T23:59:59.000Z

459

Highly transparent low capacitance plasma enhanced atomic layer deposition Al{sub 2}O{sub 3}-HfO{sub 2} tunnel junction engineering  

SciTech Connect (OSTI)

The development of metallic single electron transistor (SET) depends on the downscaling and the electrical properties of its tunnel junctions. These tunnel junctions should insure high tunnel current levels, low thermionic current, and low capacitance. The authors use atomic layer deposition to fabricate Al{sub 2}O{sub 3} and HfO{sub 2} thin layers. Tunnel barrier engineering allows the achievement of low capacitance Al{sub 2}O{sub 3} and HfO{sub 2} tunnel junctions using optimized annealing and plasma exposure conditions. Different stacks were designed and fabricated to increase the transparency of the tunnel junction while minimizing thermionic current. This tunnel junction is meant to be integrated in SET to enhance its electrical properties (e.g., operating temperature, I{sub ON}/I{sub OFF} ratio)

El Hajjam, Khalil, E-mail: khalil.el-hajjam@insa-lyon.fr [INL, INSA, UMR CNRS 5270, 7 Avenue Jean Capelle, 69621 Villeurbanne Cedex, France and Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, 3000 Boulevard Université, Sherbrooke, J1K OA5, Québec (Canada); Baboux, Nicolas; Calmon, Francis [INL, INSA, UMR CNRS 5270, 7 Avenue Jean Capelle, 69621 Villeurbanne Cedex (France); Souifi, Abdelkader [Laboratoire Nanotechnologies Nanosystèmes (LN2)-CNRS UMI-3463, Université de Sherbrooke, 3000 Boulevard Université, Sherbrooke, J1K OA5, Québec (Canada); Poncelet, Olivier; Francis, Laurent A. [ICTEAM, ELEN, UCL, Place du Levant 3, 1348 Louvain-la-Neuve (Belgium); Ecoffey, Serge; Drouin, Dominique [Laboratoire Nanotechnologies Nanosystèmes (LN2)-CNRS UMI-3463, Université de Sherbrooke, 3000 Boulevard Université, Sherbrooke, J1K OA5, Québec, Canada and Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, 3000 Boulevard Université, Sherbrooke, J1K OA5, Québec (Canada)

2014-01-15T23:59:59.000Z

460

An analysis of the pull strength behaviors of fine-pitch, flip chip solder interconnections using a Au-Pt-Pd thick film conductor on Low-Temperature, Co-fired Ceramic (LTCC) substrates.  

SciTech Connect (OSTI)

The assembly of the BDYE detector requires the attachment of sixteen silicon (Si) processor dice (eight on the top side; eight on the bottom side) onto a low-temperature, co-fired ceramic (LTCC) substrate using 63Sn-37Pb (wt.%, Sn-Pb) in a double-reflow soldering process (nitrogen). There are 132 solder joints per die. The bond pads were gold-platinum-palladium (71Au-26Pt-3Pd, wt.%) thick film layers fired onto the LTCC in a post-process sequence. The pull strength and failure modes provided the quality metrics for the Sn-Pb solder joints. Pull strengths were measured in both the as-fabricated condition and after exposure to thermal cycling (-55/125 C; 15 min hold times; 20 cycles). Extremely low pull strengths--referred to as the low pull strength phenomenon--were observed intermittently throughout the product build, resulting in added program costs, schedule delays, and a long-term reliability concern for the detector. There was no statistically significant correlation between the low pull strength phenomenon and (1) the LTCC 'sub-floor' lot; (2) grit blasting the LTCC surfaces prior to the post-process steps; (3) the post-process parameters; (4) the conductor pad height (thickness); (5) the dice soldering assembly sequence; or (5) the dice pull test sequence. Formation of an intermetallic compound (IMC)/LTCC interface caused by thick film consumption during either the soldering process or by solid-state IMC formation was not directly responsible for the low-strength phenomenon. Metallographic cross sections of solder joints from dice that exhibited the low pull strength behavior, revealed the presence of a reaction layer resulting from an interaction between Sn from the molten Sn-Pb and the glassy phase at the TKN/LTCC interface. The thick film porosity did not contribute, explicitly, to the occurrence of reaction layer. Rather, the process of printing the very thin conductor pads was too sensitive to minor thixotropic changes to ink, which resulted in inconsistent proportions of metal and glassy phase particles present during the subsequent firing process. The consequences were subtle, intermittent changes to the thick film microstructure that gave rise to the reaction layer and, thus, the low pull strength phenomenon. A mitigation strategy would be the use of physical vapor deposition (PVD) techniques to create thin film bond pads; this is multi-chip module, deposited (MCM-D) technology.

Uribe, Fernando R.; Kilgo, Alice C.; Grazier, John Mark; Vianco, Paul Thomas; Zender, Gary L.; Hlava, Paul Frank; Rejent, Jerome Andrew

2008-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

SUPERGLASS. Engineering field tests - Phase 3. Production, market planning, and product evaluation for a high-thermal-performance insulating glass design utilizing HEAT MIRROR transparent insulation. Final report  

SciTech Connect (OSTI)

HEAT MIRROR transparent window insulation consists of a clear polyester film two mils (.002'') thick with a thin, clear low-emissivity (.15) coating deposited on one side by state-of-the-art vacuum deposition processes. This neutral-colored invisible coating reflects long-wave infrared energy (heat). When mounted by being stretched with a 1/2'' air-gap on each side of the film, the resulting unit reduces heat loss by 60% compared to dual insulating glass. Southwall Corporation produces HEAT MIRROR transparent insulation and markets it to manufacturers of sealed insulating glass (I.G.) units and window and building manufacturers who make their own I.G. These companies build and sell the SUPERGLASS sealed glazing units. Units made and installed in buildings by six customers were visited. These units were located in many geographic regions, including the Pacific Northwest, Rocky Mountains, New England, Southeast, and West Coast. As much as could be obtained of their history was recorded, as was their current condition and performance. These units had been in place from two weeks to over a year. All of the units were performing thermally very well, as measured by taking temperature profiles through them and through adjacent conventional I.G. units. Some units had minor visual defects (attributed to I.G. assembly techniques) which are discussed in detail. Overall occupant acceptance was enthusiastically positive. In addition to saving energy, without compromise of optical quality or appearance, the product makes rooms with large glazing areas comfortable to be in in cold weather. All defects observed were present when built; there appears to be no in-field degradation of quality at this time.

Tilford, C L

1982-11-01T23:59:59.000Z

462

Chemical spray pyrolysis deposition and characterization of p-type CuCr1?xMgxO2 transparent oxide semiconductor thin films  

Science Journals Connector (OSTI)

A chemical spray pyrolysis technique for deposition of p-type Mg-doped CuCrO2 transparent oxide semiconductor thin films using metaloorganic precursors is described. As-deposited films contain mixed spinel CuCr2O4 and delafossite CuCrO2 structural phases. Reduction in spinel CuCr2O4 fraction and formation of highly crystalline films with single phase delafossite CuCrO2 structure is realized by annealing at temperatures ?700 °C in argon. A mechanism of synthesis of CuCrO2 films involving precursor decomposition, oxidation and reaction between constituent oxides in the spray deposition process is presented. Post-annealed CuCr0.93Mg0.07O2 thin films show high (?80%) visible transmittance and sharp absorption at band gap energy with direct and indirect optical band gaps 3.11 and 2.58 eV, respectively. Lower (?450 °C) substrate temperature formed films are amorphous and yield lower direct (2.96 eV) and indirect (2.23 eV) band gaps after crystallization. Electrical conductivity of CuCr0.93 Mg0.07O2 thin films ranged 0.6–1 S cm?1 and hole concentration ?2×1019 cm?3 determined from Seebeck analysis. Temperature dependence of conductivity exhibit activation energies ?0.11 eV in 300–470 K and ?0.23 eV in ?470 K region ascribed to activated conduction and grain boundary trap assisted conduction, respectively. Heterojunction diodes of the structure Au/n-(ZnO)/p-(CuCr0.93Mg0.07O2)/SnO2 (TCO) were fabricated which show potential for transparent wide band gap junction device.

S.H. Lim; Suma Desu; A.C. Rastogi

2008-01-01T23:59:59.000Z

463

The formation of correlated states and the increase in barrier transparency at a low particle energy in nonstationary systems with damping and fluctuations  

SciTech Connect (OSTI)

We consider peculiarities in the formation of a coherent correlated state (CCS) of a particle in a periodically modulated harmonic oscillator with damping for various types of stochastic perturbation. It is shown that in the absence of stochastic perturbation, an optimal relation exists between the damping parameter (damping coefficient) and the modulation depth, for which the 'extrinsic' characteristics of the oscillator (amplitudes of 'classical' oscillation and the momentum of a particle) remain unchanged, while the correlation coefficient rapidly increases from |r| = 0 to |r|{sub max} Almost-Equal-To 1; this corresponds to a completely correlated coherent state. Under nonoptimal conditions, the formation of the CCS with a simultaneous increase in is accompanied by damping or excitation of the oscillator. It is shown that for a certain relation between the damping coefficient and the modulation depth, the presence of a stochastic external force acting on the nonstationary oscillator does not prevent the formation of a CCS with |r|{sub max} {yields} 1. A fundamentally different effect is observed under a stochastic influence on the nonstationary frequency of the oscillator; this effect always limits the value of vertical bar r vertical bar at a level |r|{sub max} < 1; a CCR cannot be formed with an unlimited increase in its intensity, and |r|{sub max} {yields} 0. The influence of the CCS formation on the averaged probability Left-Pointing-Angle-Bracket D Right-Pointing-Angle-Bracket of the tunnel effect (transparency of the potential barrier) is considered for a particle in an oscillator with damping both in the absence and in the presence of a stochastic force. It is shown using a specific example that complete clearing of the potential barrier and the increase in the barrier transparency from the initial value Left-Pointing-Angle-Bracket D{sub r=0} Right-Pointing-Angle-Bracket 10{sup -80} to Left-Pointing-Angle-Bracket D Right-Pointing-Angle-Bracket Almost-Equal-To 1 can occur over a comparatively short time interval in both these cases. These effects can be used to obtain highly efficient nuclear fusion at a low energy of interacting particles.

Vysotskii, V. I., E-mail: vivysotskii@gmail.com [Taras Shevchenko National University (Ukraine); Adamenko, S. V. [Electrodynamic Laboratory 'Proton-21' (Ukraine); Vysotskyy, M. V. [Taras Shevchenko National University (Ukraine)

2012-10-15T23:59:59.000Z

464

Light Induced Water Oxidation on Cobalt-Phosphate (Co-Pi) Catalyst Modified Semi-Transparent, Porous SiO2-BiVO4 Electrodes  

SciTech Connect (OSTI)

A facile and simple procedure for the synthesis of semi-transparent and porous SiO{sub 2}-BiVO{sub 4} electrodes is reported. The method involves a surfactant assisted metal-organic decomposition at 500 C. An earth abundant oxygen evolution catalyst (OEC), cobalt phosphate (Co-Pi), has been used to modify the SiO{sub 2}-BiVO{sub 4} electrode by electrodeposition (ED) and photoassisted electrodeposition (PED) methods. Modified electrodes by these two methods have been examined for light induced water oxidation and compared to the unmodified SiO{sub 2}-BiVO{sub 4} electrodes by various photoelectrochemical techniques. The PED method was a more effective method of OEC preparation than the ED method as evidenced by an increased photocurrent magnitude during photocurrent-potential (I-V) characterizations. Electrode surfaces catalyzed by PED exhibited a very large cathodic shift (420 mV) in the onset potential for water oxidation. The chopped-light I-V measurements performed at different intervals over 24-hour extended testing under illumination and applied bias conditions show a fair photostability for PED Co-Pi modified SiO{sub 2}-BiVO{sub 4}.

Pilli, S. K.; Deutsch, T. G.; Furtak, T. E.; Turner, J. A.; Brown, L. D.; Herring, A. M.

2012-04-21T23:59:59.000Z

465

cis-Dichloro-bis(4,4‘-dicarboxy-2,2-bipyridine)osmium(II)-Modified Optically Transparent Electrodes:? Application as Cathodes in Stacked Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

cis-Dichloro-bis(4,4‘-dicarboxy-2,2-bipyridine)osmium(II)-Modified Optically Transparent Electrodes:? Application as Cathodes in Stacked Dye-Sensitized Solar Cells ... 4 Thus the electron can be thought of as moving (diffusing) randomly (i.e., toward or away from the collector electrode) from trap to trap. ... The horizontal axis for all of the plots is Ecell. ...

Michael J. Scott; Jeremy J. Nelson; Stefano Caramori; Carlo A. Bignozzi; C. Michael Elliott

2007-11-02T23:59:59.000Z

466

AlGaInP thin-film LED with omni-directionally reflector and ITO transparent conducting n-type contact  

Science Journals Connector (OSTI)

In this paper a novel AlGaInP thin-film light-emitting diode (LED) with omni-directionally reflector (ODR) and transparent conducting indium tin oxide (ITO) n-type contact structure is proposed, and fabrication process is developed. This reflector is realized with the combination of a low-refractive-index dielectric layer and a high reflectivity metal layer. This allows the light emitted or internally reflected downwardly towards the GaAs substrate at any angle of incidence to be reflected towards the top surface of the chip. ITO n-type contact is used for anti-reflection and current spreading layers on the ODR-LED with ITO. The sheet resistance of the ITO films (95 nm) deposited on n-ohmic contact of ODR-LED is of the order 23.5?/ with up to 90% transmittance (above 92% for 590–770 nm) in the visible region of the spectrum. The optical and electrical characteristics of the ODR-LED with ITO are presented and compared to conventional AS-LED and ODR-LED without ITO. It is shown that the light output from the ODR-LED with ITO at forward current 20 mA exceeds that of AS-LED and ODR-LED without ITO by about a factor of 1.63 and 0.16, respectively. A favourable luminous intensity of 218.3 mcd from the ODR-LED with ITO (peak wavelength 620 nm) could be obtained under 20 mA injection, which is 2.63 times and 1.21 times higher than that of AS-LED and ODR-LED without ITO, respectively.

Zhang Jian-Ming; Zou De-Shu; Xu Chen; Guo Wei-Ling; Zhu Yan-Xu; Liang Ting; Da Xiao-Li; Li Jian-Jun; Shen Guang-Di

2007-01-01T23:59:59.000Z

467

Thermal unobtainiums? The perfect thermal conductor and  

E-Print Network [OSTI]

contribute to thermal resistance · Isotopically pure diamond has highest thermal conductivity of any material materials: disordered layered crystals Conclude with some thoughts on promising, high-risk, research even in a computer model. #12;Thermal resistance is created by Umklapp scattering (U

Braun, Paul

468

Quantum Electric Circuits Analogous to Ballistic Conductors  

E-Print Network [OSTI]

The conductance steps in a constricted two-dimensional electron gas and the minimum conductivity in graphene are related to a new uncertainty relation between electric charge and conductance in a quantized electric circuit that mimics the electric transport in mesoscopic systems. This uncertainty relation makes specific use of the discreteness of electric charge. Quantum electric circuits analogous to both constricted two-dimensional electron gas and graphene are introduced. In the latter case a new insight into the origin of minimum conductivity is obtained.

Daniela Dragoman

2007-11-28T23:59:59.000Z

469

US ITER toroidal field coil conductor...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

center of the plasma core, and must be maintained at an optimal level for a stable self-sustaining reaction to take place. US Production of Superconducting Wire is Under Way for...

470

Fluoroalkyl-phosphonic-acid-based proton conductors  

Broader source: Energy.gov (indexed) [DOE]

Clemson University Greg Voth Professor Theoretical & Physical Chemistry Grant Smith Professor Computational Polymers Oleg Borodin Research Professor Computational...

471

Download Data | Transparent Cost Database  

Open Energy Info (EERE)

in the database does not represent approval of the estimates by DOE or NREL. Levelized cost calculations DO NOT represent real world market conditions. The calculation uses a...

472

Transparent conductive nano-composites  

DOE Patents [OSTI]

The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.

Geohegan, David Bruce (Knoxville, TN); Ivanov, Ilia N. (Knoxville, TN); Puretzky, Alexander A. (Knoxville, TN); Jesse, Stephen (Knoxville, TN); Hu, Bin (Knoxville, TN); Garrett, Matthew (Knoxville, TN); Zhao, Bin (Easley, SC)

2011-04-12T23:59:59.000Z

473

Search for WW and WZ production in lepton, neutrino plus jets final states at CDF Run II and Silicon module production and detector control system for the ATLAS SemiConductor Tracker  

SciTech Connect (OSTI)

In the first part of this work, we present a search for WW and WZ production in charged lepton, neutrino plus jets final states produced in p{bar p} collisions with {radical}s = 1.96 TeV at the Fermilab Tevatron, using 1.2 fb{sup -1} of data accumulated with the CDF II detector. This channel is yet to be observed in hadron colliders due to the large singleWplus jets background. However, this decay mode has a much larger branching fraction than the cleaner fully leptonic mode making it more sensitive to anomalous triple gauge couplings that manifest themselves at higher transverse W momentum. Because the final state is topologically similar to associated production of a Higgs boson with a W, the techniques developed in this analysis are also applicable in that search. An Artificial Neural Network has been used for the event selection optimization. The theoretical prediction for the cross section is {sigma}{sub WW/WZ}{sup theory} x Br(W {yields} {ell}{nu}; W/Z {yields} jj) = 2.09 {+-} 0.14 pb. They measured N{sub Signal} = 410 {+-} 212(stat) {+-} 102(sys) signal events that correspond to a cross section {sigma}{sub WW/WZ} x Br(W {yields} {ell}{nu}; W/Z {yields} jj) = 1.47 {+-} 0.77(stat) {+-} 0.38(sys) pb. The 95% CL upper limit to the cross section is estimated to be {sigma} x Br(W {yields} {ell}{nu}; W/Z {yields} jj) < 2.88 pb. The second part of the present work is technical and concerns the ATLAS SemiConductor Tracker (SCT) assembly phase. Although technical, the work in the SCT assembly phase is of prime importance for the good performance of the detector during data taking. The production at the University of Geneva of approximately one third of the silicon microstrip end-cap modules is presented. This collaborative effort of the university of Geneva group that lasted two years, resulted in 655 produced modules, 97% of which were good modules, constructed within the mechanical and electrical specifications and delivered in the SCT collaboration for assembly on the end-cap disks. The SCT end-caps and barrels consist of 4088 silicon modules, with a total of 6.3 million readout channels. The coherent and safe operation of the SCT during commissioning and subsequent operation is the essential task of the Detector Control System (DCS). The main building blocks of the DCS are the cooling system, the power supplies and the environmental system. The DCS has been initially developed for the SCT assembly phase and this system is described in the present work. Particular emphasis is given in the environmental hardware and software components, that were my major contributions. Results from the DCS testing during the assembly phase are also reported.

Sfyrla, Anna; /Geneva U.

2008-03-01T23:59:59.000Z

474

CNP optical metamaterials Joshua A. Gordon1*  

E-Print Network [OSTI]

localized resonance," Proc. R. Soc. A 462, 3027-3059 (2006). 10. R. D. Averitt, S. L. Westcott, and N. J

Ziolkowski, Richard W.

475

Toroidal Dipolar Response in a Metamaterial  

E-Print Network [OSTI]

multipoles, which could be present in naturally occurring systems, especially at the macromolecule level radiation sources: the magnetic and electric dynamic multipoles (1, 2). In a spherical coordinate system multipoles). Radiating fields, however, also contain contributions from oscillating radial components

Zheludev, Nikolay

476

Coherence of magnetic resonators in a metamaterial  

SciTech Connect (OSTI)

The coherence of periodic magnetic resonators (MRs) under oblique incidence is studied using simulations. The correlated phase of interaction including both the retardation effect and relative phase difference between two MRs is defined, and it plays a key role in the MR interaction. The correlated phase is anisotropic, as is the coherence condition. The coherence condition is the same as the Wood's anomaly and verified by the Fano resonance. This study shows that the applications of the Fano resonance of periodic MRs will become widespread owing to achieving the Fano resonance simply by tuning the incident angle.

Hou, Yumin, E-mail: ymhou@pku.edu.cn [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)] [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)

2013-12-15T23:59:59.000Z

477

FDTD Analysis of Metamaterial Coated Microwave Antenna  

E-Print Network [OSTI]

Z X y? 8 The cube in Figure 2.1 is called the Yee Cell. From Figure 2.1, it is observed that each electric field component is surrounded by four magnetic field components and each magnetic field component is surrounded by four electric... Z X y? 8 The cube in Figure 2.1 is called the Yee Cell. From Figure 2.1, it is observed that each electric field component is surrounded by four magnetic field components and each magnetic field component is surrounded by four electric...

Cholleti, Vipin K.

2011-08-08T23:59:59.000Z

478

Spatial dispersion of multilayer fishnet metamaterials  

E-Print Network [OSTI]

. Navarro-Cia, M. Sorolla, "High numerical aperture and low-loss negative refraction based on the fishnet rich anisotropy," Photonics Nanostruct. Fundam. Appl. 10(3), 263­270 (2012). 11. M. Beruete, M. Navarro

479

Magnetic and transport properties of transparent SrSn{sub 0.9}Sb{sub 0.05}Fe{sub 0.05}O{sub 3} semiconductor films  

SciTech Connect (OSTI)

The effect of antimony doping on the structural, magnetic, and electrical properties of transparent SrSn{sub 0.9}Sb{sub 0.05}Fe{sub 0.05}O{sub 3} films synthesized by RF sputtering on oxidized Si and quartz substrates has been investigated. A reduction in electrical resistivity by two orders of magnitude compared to 5% Fe doped SrSnO{sub 3} film was observed. The electrical conductivity behavior has been analyzed using the Mott's Variable range hopping model. The nature of magnetic ordering were investigated by field cooled (FC) and zero field cooled (ZFC) magnetization measurements. The applicability of models based on oxygen vacancies to explain the magnetic ordering present in the sample has been discussed.

Prathiba, G.; Harish Kumar, N. [Advanced Magnetic Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India); Venkatesh, S. [Department of Condensed Matter Physics and Material Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005 (India); Kamala Bharathi, K. [Department of Mechanical Engineering, University of Texas at El Paso, El Paso, Texas 79968 (United States)

2011-04-01T23:59:59.000Z

480

Phononic metamaterials based on complex geometries : "a new kind of metamaterial"  

E-Print Network [OSTI]

Facing the growing challenges of energy, environment, security and disease treatment, the demand for novel materials are growing. While the material centric approach have resulted in development of new materials for advanced ...

Ni, Sisi (Sisi Sophie)

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "metamaterial transparent conductor" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Metamaterials Metamaterials are engineered (multiphase) materials that exhibit properties that are much  

E-Print Network [OSTI]

to the design of filters, waveguides, logic ports, and ultrasonic transducer arrays can, for example, be used-dimensional nonlinear lattice ­ harmonic excitation at the center increases in amplitude form left to right. Energy. Stress induced topological switches adaptively handle stress waves and dissipate energy. Finally

Li, Mo

482

n&k of electrochromics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Constants of Electrochromic Materials and Transparent Conductors Constants of Electrochromic Materials and Transparent Conductors (280-2500 nm) In the following optical constants are summarized in tables. Most important representatives of different classes of electrochromic materials are listed together with the two most commonly used transparent conductors in devices. When reporting optical constants of intercalated materials the inserted amount of Li+ is given in terms of volumetric charge density. Unlike in the case of crystalline bulk material optical constants of amorphous thin films are not universal and are largely influenced by deposition conditions. However, reported results are carefully selected out of an extensive collection of experimental data and represent best performing examples of their kind as reported in detail.