Plasmonic wideband and tunable absorber based on semi etalon nano structure in the visible region

Abstract

In this study, a plasmonic meta-surface absorber by semi-etalon structure is introduced due to the importance of wideband absorbers in the visible region as solar absorber. For this purpose, soft nanolithography method was adopted to construct semi-etalon absorber based on poly-dimethyl-siloxane flexible membrane and gold grating structure onto its top and down side. In parallel, the structure was simulated by the aid of finite difference time domain method, and obtained good agreement between the measured and simulated results. The results indicated the etalon-based absorber achieved light absorption from 500 to 700 nm compared to one face gold grating which works in the wavelength range 500 to 600 nm with half of absorbed power. In addition, color production was evaluated via the proposed structure, and tunable colors were produced by changing the polarization and incidence angle. Thus, the proposed structure as a good wide-band absorber, and can be used for producing tunable colors under different polarization and incidence angles. The absorber can offer new insight in larger area solar absorber based on soft nano-lithography method because of the low cost and flexibility.

Design of Broadband Perfect Solar Absorber Based on Four-Layer Structure with Cross-Shaped Resonator and Triangular Array

“…We propose an ultra-wideband perfect absorber for solar light based on the finite-difference time-domain (FDTD) method. Previous researchers have demonstrated that actual experimental results are highly identical to those obtained using the FDTD method [24,25]. Therefore, it was feasible to probe the absorption efficiency of our proposed structure with this method.…”

Infrared metamaterial for surface-enhanced infrared absorption spectroscopy: pushing the frontier of ultrasensitive on-chip sensing

“…The material choice of the plasmonic device has a strong influence on the SEIRA performance. [112][113][114][115][116][117][118][119][120][121][122][123][124][125] Specifically, the absorption cross-sections depend on the material properties, and the scattering cross-sections of the antenna geometry. [33,126] Therefore, it is necessary to choose proper plasmonic and dielectric material for the performance optimization of SEIRA.…”

Design of Grating Type GaAs Solar Absorber and Investigation of Its Photoelectric Characteristics

“…Among all kinds of energy, as a renewable energy, solar energy is considered to be the most potential energy, because it is inexhaustible, reliable, less pollution and so on. As an important energy collection device, solar absorber has attracted more and more attention in recent years (Li et al, 2016;Chen et al, 2019a;Xiao et al, 2019;Li et al, 2020a;Roostaei et al, 2021). For an ideal absorber, it must have high efficiency light absorption and many other excellent physical properties, such as polarization stability and tunability (Li et al, 2020b;Wu et al, 2020;Yi et al, 2020;Chen et al, 2021a;Jiang et al, 2021a;Li et al, 2021a;Li et al, 2021b;Li-Ying et al, 2021;Zhou et al, 2021).…”