Numerical investigation of ultrawideband solar wave absorber with multiring resonator gold and composited MgF2-Tungsten substrate

Abstract

This study uses computational methods to explore a multi-layered ultrawideband solar absorber's visible and infrared solar spectra with a gold ring resonator structure. The absorbers are studied across the entire solar spectrum, from 0.2 to 3 µm in wavelength. Absorption, reflectance, and transmittance define the structures' performance characteristics. We have also performed numerical calculations to determine the structure's behavior across various geometric parameters, including overall dimensions, substrate size, and resonator thickness. Over a wide terahertz (THz) band, the suggested absorber structure can capture over 98% of incoming light. The performance of the absorber structure is compared to the AM 1.5 response to spectral irradiance to assess wide solar range absorption behavior. The absorber design has increased its effectiveness in absorbing the whole range of solar rays. Based on these findings, we can select an optimal operating frequency for both wide- and short-angle applications. By adjusting their sizes, readers can achieve selective band absorption, as suggested in the essay. This absorber structure may be used in constructing high-efficiency solar cells due to the incoming wave's stability at a wide incidence angle.