Black Metals: Optical Absorbers

We demonstrate a concept and fabrication of lithography-free layered metal-SiO(2) thin-film structures which have reduced reflectivity (black appearance), to as low as 0.9%, with 4.9% broadband reflectance (8.9% for soda lime) in the 500–1400 nm range. The multi-layered (four layers) thin-film metam...

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Detalles Bibliográficos
Autores principales: Lundgaard, Stefan, Ng, Soon Hock, Nishijima, Yoshiaki, Mazilu, Michael, Juodkazis, Saulius
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142461/
https://www.ncbi.nlm.nih.gov/pubmed/32121168
http://dx.doi.org/10.3390/mi11030256
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author Lundgaard, Stefan
Ng, Soon Hock
Nishijima, Yoshiaki
Mazilu, Michael
Juodkazis, Saulius
author_facet Lundgaard, Stefan
Ng, Soon Hock
Nishijima, Yoshiaki
Mazilu, Michael
Juodkazis, Saulius
author_sort Lundgaard, Stefan
collection PubMed
description We demonstrate a concept and fabrication of lithography-free layered metal-SiO(2) thin-film structures which have reduced reflectivity (black appearance), to as low as 0.9%, with 4.9% broadband reflectance (8.9% for soda lime) in the 500–1400 nm range. The multi-layered (four layers) thin-film metamaterial is designed so that optical impedance matching produces minimal reflectance and transmittance within the visible and infra-red (IR) spectral region for a range of incident angles. The structure has enhanced absorbance and is easily tuned for reduced minimal transmission and reflection. This approach should allow for novel anti-reflection surfaces by impedance matching to be realized.
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spelling pubmed-71424612020-04-15 Black Metals: Optical Absorbers Lundgaard, Stefan Ng, Soon Hock Nishijima, Yoshiaki Mazilu, Michael Juodkazis, Saulius Micromachines (Basel) Article We demonstrate a concept and fabrication of lithography-free layered metal-SiO(2) thin-film structures which have reduced reflectivity (black appearance), to as low as 0.9%, with 4.9% broadband reflectance (8.9% for soda lime) in the 500–1400 nm range. The multi-layered (four layers) thin-film metamaterial is designed so that optical impedance matching produces minimal reflectance and transmittance within the visible and infra-red (IR) spectral region for a range of incident angles. The structure has enhanced absorbance and is easily tuned for reduced minimal transmission and reflection. This approach should allow for novel anti-reflection surfaces by impedance matching to be realized. MDPI 2020-02-28 /pmc/articles/PMC7142461/ /pubmed/32121168 http://dx.doi.org/10.3390/mi11030256 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lundgaard, Stefan
Ng, Soon Hock
Nishijima, Yoshiaki
Mazilu, Michael
Juodkazis, Saulius
Black Metals: Optical Absorbers
title Black Metals: Optical Absorbers
title_full Black Metals: Optical Absorbers
title_fullStr Black Metals: Optical Absorbers
title_full_unstemmed Black Metals: Optical Absorbers
title_short Black Metals: Optical Absorbers
title_sort black metals: optical absorbers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142461/
https://www.ncbi.nlm.nih.gov/pubmed/32121168
http://dx.doi.org/10.3390/mi11030256
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AT ngsoonhock blackmetalsopticalabsorbers
AT nishijimayoshiaki blackmetalsopticalabsorbers
AT mazilumichael blackmetalsopticalabsorbers
AT juodkazissaulius blackmetalsopticalabsorbers

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