Design and optimization of a polarization-insensitive Ti/TiO₂ metamaterial absorber using particle swarm optimization for broadband solar-thermal applications.

ABSTRACT: In this paper, a polarization-insensitive and ultra-broadband metamaterial absorber composed of titanium (Ti) and titanium dioxide (TiO₂) resonators is proposed. The multilayer architecture integrates three square resonators and one disk resonator, which are optimized to maximize absorption across the 0.25-4 μm spectral range. Particle swarm optimization (PSO) yields an average absorption of 98.99% and a bandwidth of 3533 nm (467-4000 nm). The structure maintains absorption above 80% for transverse magnetic (TM) polarization and above 90% for transverse electric (TE) polarization for wavelengths above 600 nm, even at incidence angles up to 60°. Under the Air Mass 1.5 Global spectrum (AM 1.5G) solar spectrum, the device achieves a solar absorption efficiency of 98.17% and a therm

SUBMITTER: Saeed MR 

PROVIDER: S-EPMC12808734 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature