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

As solar energy is a low-cost and clean source, there has been great deal of interest in how to harvest it. To absorb efficiently, we designed broadband metamaterial absorber based on the principle Fabry–Pérot (FP) cavities surface plasmon resonance (SPR). We propose perfect consisting four-layer structure silica–tungsten–silica–titanium (SiO2–W–SiO2–Ti) for incident light wavelength range 300–2500 nm. The achieves absorption 351.8–2465.0 nm (absorption > 90%), with an average 96.3%. advantage our proposed that it combines characteristics both high absorption, overall efficiency radiation. It also independent polarization insensitive angle. investigated was affected by different structures, materials, geometric parameters, refractive indices dielectric explored reasons absorption. This refractory ultrathin, offers good tradeoff between bandwidth therefore premium application prospects value.