Metasurface Broadband Solar Absorber

We demonstrate a broadband, polarization independent, wide-angle absorber based on a metallic metasurface architecture, which accomplishes greater than 90% absorptance in the visible and near-infrared range of the solar spectrum and exhibits low absorptivity (emissivity) at mid- and far-infrared wav...

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Bibliographic Details
Published in:Scientific reports Vol. 6; no. 1; p. 20347
Main Authors: Azad, Abul K., Kort-Kamp, Wilton J. M., Sykora, Milan, Weisse-Bernstein, Nina R., Luk, Ting S., Taylor, Antoinette J., Dalvit, Diego A. R., Chen, Hou-Tong
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01.02.2016
Nature Publishing Group
Subjects:
639/624/399/1015
639/925/357/1015
Absorptance
Absorption
Emissivity
Frequency dependence
Gold
Humanities and Social Sciences
I.R. radiation
MATERIALS SCIENCE
Metamaterials
multidisciplinary
NANOSCIENCE AND NANOTECHNOLOGY
Photovoltaic cells
Polarization
Science
Silicon
Silicon dioxide
Wavelengths
ISSN:2045-2322, 2045-2322
Online Access:Get full text
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Summary:We demonstrate a broadband, polarization independent, wide-angle absorber based on a metallic metasurface architecture, which accomplishes greater than 90% absorptance in the visible and near-infrared range of the solar spectrum and exhibits low absorptivity (emissivity) at mid- and far-infrared wavelengths. The complex unit cell of the metasurface solar absorber consists of eight pairs of gold nano-resonators that are separated from a gold ground plane by a thin silicon dioxide spacer. Our experimental measurements reveal high-performance absorption over a wide range of incidence angles for both s- and p-polarizations. We also investigate numerically the frequency-dependent field and current distributions to elucidate how the absorption occurs within the metasurface structure.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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LA-UR-15-24569; SAND-2017-0018J; SAND-2017-0019J
USDOE National Nuclear Security Administration (NNSA)
AC52-06NA25396; AC04-94AL85000
ISSN:2045-2322
2045-2322
DOI:10.1038/srep20347