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Title: Metallic layer-by-layer photonic crystals for linearly-polarized thermal emission and thermophotovoltaic device including same

Abstract

Metallic thermal emitters consisting of two layers of differently structured nickel gratings on a homogeneous nickel layer are fabricated by soft lithography and studied for polarized thermal radiation. A thermal emitter in combination with a sub-wavelength grating shows a high extinction ratio, with a maximum value close to 5, in a wide mid-infrared range from 3.2 to 7.8 .mu.m, as well as high emissivity up to 0.65 at a wavelength of 3.7 .mu.m. All measurements show good agreement with theoretical predictions. Numerical simulations reveal that a high electric field exists within the localized air space surrounded by the gratings and the intensified electric-field is only observed for the polarizations perpendicular to the top sub-wavelength grating. This result suggests how the emissivity of a metal can be selectively enhanced at a certain range of wavelengths for a given polarization.

Inventors:
; ;
Issue Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1273409
Patent Number(s):
9400219
Application Number:
12/754,657
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
DOE Contract Number:  
AC02-06CH11358
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Apr 06
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 14 SOLAR ENERGY; 36 MATERIALS SCIENCE

Citation Formats

Lee, Jae-Hwang, Ho, Kai-Ming, and Constant, Kristen P. Metallic layer-by-layer photonic crystals for linearly-polarized thermal emission and thermophotovoltaic device including same. United States: N. p., 2016. Web.
Lee, Jae-Hwang, Ho, Kai-Ming, & Constant, Kristen P. Metallic layer-by-layer photonic crystals for linearly-polarized thermal emission and thermophotovoltaic device including same. United States.
Lee, Jae-Hwang, Ho, Kai-Ming, and Constant, Kristen P. Tue . "Metallic layer-by-layer photonic crystals for linearly-polarized thermal emission and thermophotovoltaic device including same". United States. https://www.osti.gov/servlets/purl/1273409.
@article{osti_1273409,
title = {Metallic layer-by-layer photonic crystals for linearly-polarized thermal emission and thermophotovoltaic device including same},
author = {Lee, Jae-Hwang and Ho, Kai-Ming and Constant, Kristen P.},
abstractNote = {Metallic thermal emitters consisting of two layers of differently structured nickel gratings on a homogeneous nickel layer are fabricated by soft lithography and studied for polarized thermal radiation. A thermal emitter in combination with a sub-wavelength grating shows a high extinction ratio, with a maximum value close to 5, in a wide mid-infrared range from 3.2 to 7.8 .mu.m, as well as high emissivity up to 0.65 at a wavelength of 3.7 .mu.m. All measurements show good agreement with theoretical predictions. Numerical simulations reveal that a high electric field exists within the localized air space surrounded by the gratings and the intensified electric-field is only observed for the polarizations perpendicular to the top sub-wavelength grating. This result suggests how the emissivity of a metal can be selectively enhanced at a certain range of wavelengths for a given polarization.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {7}
}

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