Broadband Solar Absorber Based on Square Ring cross Arrays of ZnS

Abstract

Solar energy is an inexhaustible clean energy. However, how to improve the absorption efficiency in the visible band is a long-term problem for researchers. Therefore, an electromagnetic wave absorber with an ultra-long absorption spectrum has been widely considered by researchers of optoelectronic materials. A kind of absorbing material based on ZnS material is presented in this paper. Our purpose is for the absorber to achieve a good and wide spectrum of visible light absorption performance. In the wide spectrum band (553.0 THz–793.0 THz) of the absorption spectrum, the average absorption rate of the absorber is above 94%. Using surface plasmon resonance (SPR) and gap surface plasmon mode, the metamaterial absorber was studied in visible light. In particular, the absorber is insensitive to both electric and magnetic absorption. The absorber can operate in complex electromagnetic environments and at high temperatures. This is because the absorber is made of refractory metals. Finally, we discuss and analyze the influence of the parameters regulating the absorber on the absorber absorption efficiency. We have tried to explain why the absorber can produce wideband absorption.

Ultra-Broadband Spectrally Selective Absorber for Solar Thermal Absorption Based on TiN Square-Ring Meta-Structure

“…With the deep research on metamaterial and surface plasmon, wideband absorbers with excellent spectral selectivity and insensitivity to polarization and incidence angle have been proposed one by one [3][4][5][6][7], which is expected to be applied in the design of solar absorbers. Further, kinds of solar spectrally selective absorber structures such as multilayer metal/insulator/metal structure [8][9][10][11][12], fishnet gratings [13][14][15][16], moth eye [17][18][19], and ring structure [20][21][22][23] have been studied for solar thermal absorption.…”

Investigating the Absorption Spectra of a Plasmonic Metamaterial Absorber Based on Disc-in-Hole Nanometallic Structure

“…Since most metamaterials are made from metals, the plasmonic effect of metals is extremely crucial in metamaterial absorbers [ 27 ]. Metamaterial absorbers are manufactured in multilayer, two-layer, three-layer [ 26 ], and four-layer structures to enhance their optical absorption [ 28 , 29 ]. Three-layer metamaterial absorbers are the most commonly used variant [ 28 ].…”

“…They are composed of metal–insulator–metal stacks. The top layer of the metamaterial absorber is a metal in a periodic pattern followed by a dielectric layer, and the bottom layer is a metal reflector [ 29 , 30 ]. The thickness of the third layer is crucial in preventing light transmission.…”