title: Metasurface Broadband Solar Absorber.
abstract: 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.
authors.affiliation: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, MS K771, Los Alamos, New Mexico 87545, USA.
authors.forename: Abul K
authors.initials: AK
authors.lastname: Azad
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, MS B213, Los Alamos, New Mexico 87545, USA.|Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Wilton J M
authors.initials: WJ
authors.lastname: Kort-Kamp
authors.affiliation: Chemistry Division, Los Alamos National Laboratory, MS K558, Los Alamos, New Mexico 87545, USA.
authors.forename: Milan
authors.initials: M
authors.lastname: Sykora
authors.affiliation: Intelligence and Space Research Division, Los Alamos National Laboratory, MS B244, Los Alamos, New Mexico 87545, USA.
authors.forename: Nina R
authors.initials: NR
authors.lastname: Weisse-Bernstein
authors.affiliation: Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, USA.
authors.forename: Ting S
authors.initials: TS
authors.lastname: Luk
authors.affiliation: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, MS K771, Los Alamos, New Mexico 87545, USA.
authors.forename: Antoinette J
authors.initials: AJ
authors.lastname: Taylor
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, MS B213, Los Alamos, New Mexico 87545, USA.
authors.forename: Diego A R
authors.initials: DA
authors.lastname: Dalvit
authors.affiliation: Center for Integrated Nanotechnologies, Los Alamos National Laboratory, MS K771, Los Alamos, New Mexico 87545, USA.
authors.forename: Hou-Tong
authors.initials: HT
authors.lastname: Chen
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