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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