Anti-reflection coating design for metallic terahertz meta-materials

Pancaldi, Matteo; Freeman, Ryan; Hudl, Matthias; Hoffmann, Matthias C.; Urazhdin, Sergei; Vavassori, Paolo; Bonetti, Stefano

doi:10.1364/OE.26.002917

Title: Anti-reflection coating design for metallic terahertz meta-materials

Abstract

We demonstrate a silicon-based, single-layer anti-reflection coating that suppresses the reflectivity of metals at near-infrared frequencies, enabling optical probing of nano-scale structures embedded in highly reflective surroundings. Our design does not affect the interaction of terahertz radiation with metallic structures that can be used to achieve terahertz near-field enhancement. We have verified the functionality of the design by calculating and measuring the reflectivity of both infrared and terahertz radiation from a silicon/gold double layer as a function of the silicon thickness. We have also fabricated the unit cell of a terahertz meta-material, a dipole antenna comprising two 20-nm thick extended gold plates separated by a 2 μm gap, where the terahertz field is locally enhanced. We used the time-domain finite element method to demonstrate that such near-field enhancement is preserved in the presence of the anti-reflection coating. Finally, we performed magneto-optical Kerr effect measurements on a single 3-nm thick, 1-μm wide magnetic wire placed in the gap of such a dipole antenna. The wire only occupies 2% of the area probed by the laser beam, but its magneto-optical response can be clearly detected. Our design paves the way for ultrafast time-resolved studies, using table-top femtosecond near-infrared lasers, of dynamics inmore »« less

Authors:

Pancaldi, Matteo; Freeman, Ryan; Hudl, Matthias; Hoffmann, Matthias C.; Urazhdin, Sergei; Vavassori, Paolo;

Publication Date:: 2018-01-26

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Swedish Research Council (SRC); European Research Council (ERC); European Union Programme; Spanish Ministry of Economy, Industry and Competitiveness; National Science Foundation (NSF)

OSTI Identifier:: 1418183

Alternate Identifier(s):: OSTI ID: 1426160

Grant/Contract Number:: 2015-SLAC-100238-Funding; AC02-76SF00515; 600398s; 715452; 737093; MDM-2016-0618; DMR-1504449; ECCS-1509794; E0635001

Resource Type:: Published Article

Journal Name:: Optics Express

Additional Journal Information:: Journal Name: Optics Express Journal Volume: 26 Journal Issue: 3; Journal ID: ISSN 1094-4087

Publisher:: Optical Society of America

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Spectroscopy, terahertz; Femtosecond phenomena; Metamaterials; Magneto-optical materials

Citation Formats


                    Pancaldi, Matteo, Freeman, Ryan, Hudl, Matthias, Hoffmann, Matthias C., Urazhdin, Sergei, Vavassori, Paolo, and Bonetti, Stefano. Anti-reflection coating design for metallic terahertz meta-materials.  United States: N. p., 2018. 
Web.  https://doi.org/10.1364/OE.26.002917.

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                    Pancaldi, Matteo, Freeman, Ryan, Hudl, Matthias, Hoffmann, Matthias C., Urazhdin, Sergei, Vavassori, Paolo, & Bonetti, Stefano. Anti-reflection coating design for metallic terahertz meta-materials.  United States.  https://doi.org/10.1364/OE.26.002917

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                    Pancaldi, Matteo, Freeman, Ryan, Hudl, Matthias, Hoffmann, Matthias C., Urazhdin, Sergei, Vavassori, Paolo, and Bonetti, Stefano. Fri .  
"Anti-reflection coating design for metallic terahertz meta-materials".  United States.  https://doi.org/10.1364/OE.26.002917.

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@article{osti_1418183,

  title        = {Anti-reflection coating design for metallic terahertz meta-materials},

  author       = {Pancaldi, Matteo and Freeman, Ryan and Hudl, Matthias and Hoffmann, Matthias C. and Urazhdin, Sergei and Vavassori, Paolo and Bonetti, Stefano},

  abstractNote = {We demonstrate a silicon-based, single-layer anti-reflection coating that suppresses the reflectivity of metals at near-infrared frequencies, enabling optical probing of nano-scale structures embedded in highly reflective surroundings. Our design does not affect the interaction of terahertz radiation with metallic structures that can be used to achieve terahertz near-field enhancement. We have verified the functionality of the design by calculating and measuring the reflectivity of both infrared and terahertz radiation from a silicon/gold double layer as a function of the silicon thickness. We have also fabricated the unit cell of a terahertz meta-material, a dipole antenna comprising two 20-nm thick extended gold plates separated by a 2 μm gap, where the terahertz field is locally enhanced. We used the time-domain finite element method to demonstrate that such near-field enhancement is preserved in the presence of the anti-reflection coating. Finally, we performed magneto-optical Kerr effect measurements on a single 3-nm thick, 1-μm wide magnetic wire placed in the gap of such a dipole antenna. The wire only occupies 2% of the area probed by the laser beam, but its magneto-optical response can be clearly detected. Our design paves the way for ultrafast time-resolved studies, using table-top femtosecond near-infrared lasers, of dynamics in nano-structures driven by strong terahertz radiation.},

  doi          = {10.1364/OE.26.002917},

  journal      = {Optics Express},

  number       = 3,

  volume       = 26,

  place        = {United States},

  year         = {2018},

  month        = {1}

}

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Cited by: 2 works

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Figures / Tables:

Fig. 1: Design of the dipole antenna for terahertz near-field enhancement in the gap between two metallic electrodes, covered with an anti-reflection coating for near-infrared and visible radiation. A single-cycle of the terahertz field, with the suitable polarization for the optimal coupling to the antenna, is sketched. The pink arrowsmore »

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Works referencing / citing this record:

Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics
journal, January 2019

Yenisoy, Adem; Yesilyaprak, Cahit; Ruzgar, Kemal
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Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics
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Yenisoy, Adem; Yesilyaprak, Cahit; Ruzgar, Kemal
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Similar Records

Title: Anti-reflection coating design for metallic terahertz meta-materials

Abstract

Citation Formats

Figures / Tables:

Intense ultrashort terahertz pulses: generation and applications journal, February 2011

Probing Unfolded Acoustic Phonons with X Rays journal, July 2008

Terahertz-field-induced insulator-to-metal transition in vanadium dioxide metamaterial journal, July 2012

Ultrafast Photovoltaic Response in Ferroelectric Nanolayers journal, February 2012

Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5 journal, December 2014

Persistence of magnetic order in a highly excited Cu 2 + state in CuO journal, June 2014

A time-dependent order parameter for ultrafast photoinduced phase transitions journal, August 2014

Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon journal, March 2014

Enhanced coherent oscillations in the superconducting state of underdoped YB a 2 C u 3 O 6 + x induced via ultrafast terahertz excitation journal, June 2015

THz-Driven Ultrafast Spin-Lattice Scattering in Amorphous Metallic Ferromagnets journal, August 2016

Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4 journal, May 2016

Control of two-phonon correlations and the mechanism of high-wavevector phonon generation by ultrafast light pulses journal, July 2016

Ultrafast terahertz-field-driven ionic response in ferroelectric BaTiO 3 journal, November 2016

Active terahertz metamaterial devices journal, November 2006

Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas journal, January 2011

Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements journal, January 2012

Terahertz radiation-induced sub-cycle field electron emission across a split-gap dipole antenna journal, December 2015

THz near-field enhancement by means of isolated dipolar antennas: the effect of finite sample size journal, January 2016

Local terahertz field enhancement for time-resolved x-ray diffraction journal, February 2017

Modeling magneto-optical thin film media for optical data storage journal, October 1988

Quadrilayer magneto-optic enhancement with zero Kerr ellipticity journal, December 1991

Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures journal, July 2004

Cavity-Enhanced Magnetooptical Observation of Magnetization Reversal in Individual Single-Domain Nanomagnets journal, July 2005

Magneto-Optical Observation of Picosecond Dynamics of Single Nanomagnets journal, December 2006

Optimization of nano-magneto-optic sensitivity using dual dielectric layer enhancement journal, June 2007

Nanoantennas for visible and infrared radiation journal, January 2012

Mirror Coatings for Low Visible and High Infrared Reflectance* journal, January 1956

Antireflection coatings on metals for selective solar absorbers journal, February 1979

The Extreme Values of Reflectivity and the Conditions for Zero Reflection from Thin Dielectric Films on Metal journal, January 1964

Optical properties of fully amorphous silicon journal, October 2000

A hydrogen-bonded organic nonlinear optical crystal for high-efficiency terahertz generation and detection journal, January 2008

Surface magneto-optic Kerr effect journal, March 2000

Polarization modulation technique for magneto-optical quantitative vector magnetometry journal, September 2000

Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics journal, January 2019

Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics journal, January 2019

Terahertz magnetic field enhancement in an asymmetric spiral metamaterial journal, October 2018

Active broadband terahertz wave impedance matching based on optically doped graphene–silicon heterojunction journal, February 2019

Coupling phenomena and collective effects in resonant meta-atoms supporting both plasmonic and (opto-)magnetic functionalities: an overview on properties and applications [Invited] journal, January 2019

Intense ultrashort terahertz pulses: generation and applications
journal, February 2011

Probing Unfolded Acoustic Phonons with X Rays
journal, July 2008

Terahertz-field-induced insulator-to-metal transition in vanadium dioxide metamaterial
journal, July 2012

Ultrafast Photovoltaic Response in Ferroelectric Nanolayers
journal, February 2012

Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5
journal, December 2014

Persistence of magnetic order in a highly excited ${Cu}^{2 +}$ state in CuO
journal, June 2014

A time-dependent order parameter for ultrafast photoinduced phase transitions
journal, August 2014

Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon
journal, March 2014

Enhanced coherent oscillations in the superconducting state of underdoped $YB a_{2} C u_{3} O_{6 + x}$ induced via ultrafast terahertz excitation
journal, June 2015

THz-Driven Ultrafast Spin-Lattice Scattering in Amorphous Metallic Ferromagnets
journal, August 2016

Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4
journal, May 2016

Control of two-phonon correlations and the mechanism of high-wavevector phonon generation by ultrafast light pulses
journal, July 2016

Ultrafast terahertz-field-driven ionic response in ferroelectric ${BaTiO}_{3}$
journal, November 2016

Active terahertz metamaterial devices
journal, November 2006

Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas
journal, January 2011

Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements
journal, January 2012

Terahertz radiation-induced sub-cycle field electron emission across a split-gap dipole antenna
journal, December 2015

THz near-field enhancement by means of isolated dipolar antennas: the effect of finite sample size
journal, January 2016

Local terahertz field enhancement for time-resolved x-ray diffraction
journal, February 2017

Modeling magneto-optical thin film media for optical data storage
journal, October 1988

Quadrilayer magneto-optic enhancement with zero Kerr ellipticity
journal, December 1991

Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures
journal, July 2004

Cavity-Enhanced Magnetooptical Observation of Magnetization Reversal in Individual Single-Domain Nanomagnets
journal, July 2005

Magneto-Optical Observation of Picosecond Dynamics of Single Nanomagnets
journal, December 2006

Optimization of nano-magneto-optic sensitivity using dual dielectric layer enhancement
journal, June 2007

Nanoantennas for visible and infrared radiation
journal, January 2012

Mirror Coatings for Low Visible and High Infrared Reflectance*
journal, January 1956

Antireflection coatings on metals for selective solar absorbers
journal, February 1979

The Extreme Values of Reflectivity and the Conditions for Zero Reflection from Thin Dielectric Films on Metal
journal, January 1964

Optical properties of fully amorphous silicon
journal, October 2000

A hydrogen-bonded organic nonlinear optical crystal for high-efficiency terahertz generation and detection
journal, January 2008

Surface magneto-optic Kerr effect
journal, March 2000

Polarization modulation technique for magneto-optical quantitative vector magnetometry
journal, September 2000

Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics
journal, January 2019

Ultra-broad band antireflection coating at mid wave infrared for high efficient germanium optics
journal, January 2019

Terahertz magnetic field enhancement in an asymmetric spiral metamaterial
journal, October 2018

Active broadband terahertz wave impedance matching based on optically doped graphene–silicon heterojunction
journal, February 2019

Coupling phenomena and collective effects in resonant meta-atoms supporting both plasmonic and (opto-)magnetic functionalities: an overview on properties and applications [Invited]
journal, January 2019