Metasurface Broadband Solar Absorber

被引：0
作者：
Abul K. Azad
Wilton J. M. Kort-Kamp
Milan Sykora
Nina R. Weisse-Bernstein
Ting S. Luk
Antoinette J. Taylor
Diego A. R. Dalvit
Hou-Tong Chen
机构：
[1] Center for Integrated Nanotechnologies,Theoretical Division
[2] Los Alamos National Laboratory,Chemistry Division
[3] Los Alamos National Laboratory,Intelligence and Space Research Division
[4] Center for Nonlinear Studies,undefined
[5] Los Alamos National Laboratory,undefined
[6] Los Alamos National Laboratory,undefined
[7] Los Alamos National Laboratory,undefined
[8] Center for Integrated Nanotechnologies,undefined
[9] Sandia National Laboratories,undefined
来源：
Scientific Reports | / 6卷
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摘要：
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.
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