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Title: Plasmonic Antireflection Coatings in the Infrared.

Abstract

Abstract not provided.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1267299
Report Number(s):
SAND2007-0211C
524283
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the IEEE AP-S International Symposium 2007 held June 10-15, 2007 in Honolulu, HI.
Country of Publication:
United States
Language:
English

Citation Formats

Basilio, Lorena I., Peters, David W., and Loui, Hung. Plasmonic Antireflection Coatings in the Infrared.. United States: N. p., 2007. Web.
Basilio, Lorena I., Peters, David W., & Loui, Hung. Plasmonic Antireflection Coatings in the Infrared.. United States.
Basilio, Lorena I., Peters, David W., and Loui, Hung. Mon . "Plasmonic Antireflection Coatings in the Infrared.". United States. doi:. https://www.osti.gov/servlets/purl/1267299.
@article{osti_1267299,
title = {Plasmonic Antireflection Coatings in the Infrared.},
author = {Basilio, Lorena I. and Peters, David W. and Loui, Hung},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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  • No abstract prepared.
  • High-index and low-index thin-film antireflection (AR) coatings for use at 355 nm have been tested to determine their resistance to laser damage. All coatings consisted of dielectric materials which were vacuum deposited onto bowl-feed polished Suprasil II by evaporation. Laser damage studies were made by irradiating several sites on each sample with a 0.6 ns, 355 nm laser pulse. Each site was irradiated by only one pulse. High-index coatings were made with both a high-index material and a low-index material. The high-index materials chosen for this study were scandia (Sc/sub 2/O/sub 3/), hafnia (HfO/sub 2/), and zirconia (ZrO/sub 2/), whilemore » the low-index materials were silica (SiO/sub 2/) and magnesium fluoride (MgF/sub 2/). All coatings had four non-quarterwave thick layers plus a halfwave-thick undercoat (barrier layer) of the low-index material. Average damage threshold values for four samples of each type ranged from 2.4 J/sq cm to 3.1 J/sq cm. Coatings made from scandia/magnesium fluoride had the highest damage thresholds. Low-index coatings contained only low-index materials. The low-index materials chosen for this study were samarium fluoride (SmF/sub 3/), lanthanum fluoride (LaF/sub 3/) thorium fluoride (ThF/sub 4/), silica, magnesium fluoride, and lithium fluoride (LiF). AR coatings containing three to six quarterwave-thick layers plus a halfwave-thick barrier layers were made from nine combinations of these six materials. Average damage threshold values for four to six samples of each type ranged from <1.0 J/sq cm to 2.8 J/sq cm. Coatings made from samarium fluoride/magnesium fluoride had the highest damage thresholds. One set of four scandia/silica coatings was measured at both 355 nm and 248 nm. Damage thresholds at 248 nm for these parts were determined using 20 ns laser pulses. The average threshold was 4.2 J/sq cm.« less
  • The analysis of the local heating role in the processes of the degradation of the antireflection coatings of the nonlinear crystals when they have been used in the CW and quasi-CW YAG lasers was carried out. The broad sample range of the oxide, nitride and fluoride films deposited on the LiNbO{sub 3}, BaNaNbO{sub 5}, LiIO{sub 3} KTP and BBO crystals was considered. Investigation of these samples was carried out under the intense heating of their surfaces by the action of the CO{sub 2} laser pulses. The analysis of the obtained results with account for the chemical reaction thermodynamics, thermotension andmore » other factors is presented.« less
  • Antireflection (AR) coatings can be incorporated into highly transmitting glazings that, depending on their cost, performance, and durability of optical properties, can be economically viable in solar collectors, agricultural greenhouses, and PV systems. A number of AR-coated glazings have been prepared under the auspices of the International Energy Agency (IEA) Working Group on Durability of Materials for Solar Thermal Collectors. The AR coatings are of two types, including (1) various sol-gels applied to glass and (2) an embossed treatment of sheet acrylic. Typically, for unweathered glazings, a 4%--5% increase in solar-weighted transmittance has been achieved. For AR-coated glass, reflectance valuesmore » as low as 0.5%--0.7% at selected wavelengths (680--720 nm) were obtained. To determine the durability of the hemispherical transmittance, several collaborating countries are testing these materials both outdoors and in accelerated weathering chambers. All materials exposed outdoors are affixed to mini-collector boxes to simulate flat-plate collector conditions. Results for candidate AR coatings weathered at geographically disperse outdoor test sites exhibit changes in spectral transmittance primarily in the high visible range (600--700 nm). Accelerated testing at measured levels of simulated solar irradiance and at different constant levels of temperature and relative humidity have been performed in different countries. Parallel testing with different levels of laboratory-controlled relevant stress factors permits the time-dependent performance of these materials to be compared with measured results from in-service outdoor exposure conditions. Coating adhesion and performance loss resulting from dirt and dust retention are also discussed.« less