Journal: ACS Photonics

Article Title: Designing Metasurfaces for Efficient Solar Energy Conversion

doi: 10.1021/acsphotonics.3c01013

Figure Lengend Snippet: Schematic representation of (a) forward and (b) inverse electromagnetic design processes. The forward design approach begins with a predefined geometric structure, simulating its electromagnetic response. Conversely, the inverse design method starts with a desired electromagnetic response and then optimizes the structure to achieve the specified response. Adapted with permission from ref . Copyright 2021 Wiley-VCH.

Article Snippet: The standard design process is typically executed through a combination of theoretical approaches, computational electromagnetic (CEM) simulations, or experimental methods ( Figure a).

Techniques:

Journal: ACS Photonics

Article Title: Designing Metasurfaces for Efficient Solar Energy Conversion

doi: 10.1021/acsphotonics.3c01013

Figure Lengend Snippet: Metasurfaces for radiative cooling. (a) Schematic of passive daytime radiative cooling (PDRC). (b) Optical absorption (or emissivity) spectrum of an ideal PDRC device compared to the blackbody radiation spectrum at 300 K, the AM1.5G solar spectrum and the atmospheric transmission spectrum. (a, b) Reproduced with permission from ref . Copyright 2023 Wiley-VCH. (c) Tilted SEM image of a metasurface based on conical multilayer Al–Ge pillars and (d) calculated cooling power of the same with 3% solar absorption and a convective heat exchanger. (c, d) Reproduced with permission from ref . Copyright 2015 Wiley-VCH. (e) Optical absorption in Cu/ZnS/Cu multicavity arrays exhibiting five different fundamental gap plasmon cavity modes (λ 1 = 6.2 μm, λ 2 = 7.8 μm, λ 3 = 8.9 μm, λ 4 = 10.2 μm, λ 5 = 11.6 μm) and a higher-order mode (* = 5.5 μm). The right panel shows the electric field intensity map along the horizontal plane of the ZnS spacer layer at wavelength λ = λ 5 . Adapted with permission from ref . Copyright 2021 American Chemical Society. (f) Schematic and (g) spectral emittance at different temperatures (from 25 to 100 °C) of a thermally tunable metasurface based on VO 2 disks deposited on an Al substrate with an HfO 2 spacer. (h) Simulated electromagnetic field distribution at λ = 5 μm along the cross section of the VO 2 metasurface in the metallic state. (f–h) Adapted with permission from ref . Copyright 2020 American Chemical Society. (i) Schematic of a self-adaptive multilayer metasurface based on “small” and “large” cross resonators at low temperature and (j) at high temperature and (k) corresponding optical absorption spectra. (i–k) Adapted with permission from ref . Copyright 2020 Royal Society of Chemistry.

Article Snippet: The standard design process is typically executed through a combination of theoretical approaches, computational electromagnetic (CEM) simulations, or experimental methods ( Figure a).

Techniques: Transmission Assay