Abstract
Metamaterials (MTMs) have various applications like plasmonic sensors, light trapping, light detector, color imaging, real invisible clock, magnetic resonance imaging, thermal imaging, solar cells, etc. We have used CST software to simulate four nano-rings-based broadband MTM absorbers in this paper. The simulated structure consists of three layers in the form of a metal-dielectric-metal that exhibit a good impedance near unity with plasmonic resonance characteristics. Tungsten (W) is chosen as the metal and silicon dioxide (SiO2)as the dielectric. The designed structure exhibits an average absorption of 98.19% at the applied wavelength and also exhibits broadband absorption with almost perfect absorption. The physical dimensions, as well as the design of the proposed absorber, have been studied parametrically. Absorber performance has been investigated for transverse electric (TE) and transverse magnetic (TM) modes at wide angles up to 50°, which may be helpful for solar thermo-photovoltaic (STPV) and solar power harvesting device applications. For solar cell applications, we have calculated numerical values of short circuit current density (Jsc) and efficiency (η).
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