Issue 36, 2022

Extremely broadband light absorption by bismuth-based metamaterials involving hybrid resonances

Abstract

An ultra-broadband polarization-insensitive perfect absorber for the 400–4000 nm spectral range is proposed and studied. The absorber is composed of a dielectric film and a phase change material film sandwiched between a bismuth square ring array and a continuous bismuth mirror. Greater than 94% absorptivity across the wavelength range of 400–4000 nm and an averaged absorptivity of about 97% can be achieved. The physical origin results from the mixed effect of guided mode resonance (GMR), cavity resonance (CR) and surface plasmon resonance (SPR). In addition, such a property is maintained excellent in a very large viewing angle range. Furthermore, the proposed scheme exhibits certain geometrical parameter tolerance, which is beneficial for practical fabrication with low cost. Finally, the potential application of the solar cells is investigated as an illustration. The designed metamaterial absorber will find promising applications in solar cells, thermo-photovoltaics and detection.

Graphical abstract: Extremely broadband light absorption by bismuth-based metamaterials involving hybrid resonances

Article information

Article type
Paper
Submitted
24 Jun 2022
Accepted
22 Jul 2022
First published
25 Jul 2022

Phys. Chem. Chem. Phys., 2022,24, 21612-21616

Extremely broadband light absorption by bismuth-based metamaterials involving hybrid resonances

J. Wu, D. Huang, B. Wu and X. Wu, Phys. Chem. Chem. Phys., 2022, 24, 21612 DOI: 10.1039/D2CP02869G

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