This work presents the design, fabrication, and characterization of a reconfigurable near‐perfect absorber based on a Metal– Sb2S3–Metal trilayer structure for applications across the visible and near‐infrared spectrum. Unlike conventional phase‐change materials such as GST, which suffer from high optical absorption, the use of Sb2S3 provides significantly reduced dissipation and enables broadband tunability of the resonant absorption peaks through Fabry–Pérot cavity effects. We experimentally demonstrate wavelength‐selective behavior with strong agreement between measured and simulated results. The proposed design combines spectral selectivity, polarization sensitivity, angle‐independence, and structural simplicity, validating Sb2S3 as a next‐generation material for tunable nanophotonic devices and establishing a new route for reconfigurable absorbers in integrated photonics.
Oliveira et al. (Wed,) studied this question.