Improvement of a Switchable Wide-Incident-Angle Perfect Absorber Incorporating Sb2S3

作者：Yaolan Tian, Guoxu Zhang, Yan Li, Mei Shen, Yufeng Xiong, Ting Li, Yunzheng Wang, Xian Zhao, Changbao Ma · 发表于：Materials · 年份：2025 · DOI：10.3390/ma18235305 · 被引用次数：1 · 研究领域：Metamaterials and Metasurfaces Applications、Thermal Radiation and Cooling Technologies、Phase-change materials and chalcogenides

Active metasurfaces, whose optical properties can be tuned by an external stimulus such as electric or laser pulses, have attracted great research interest recently. The phase change material (PCM), antimony sulfide (Sb2S3), has been reported to modulate resonance wavelengths from the visible to the infrared. Here, we present a purely numerical study of an active and nonvolatile narrow-band perfect absorber in the infrared region based on a nanostructured metal–insulator–metal (MIM) metasurface incorporating Sb2S3. The proposed absorber exhibits a high quality factor and achieves near-unity absorption at resonance wavelengths. In addition, the absorption spectrum can be dynamically modulated by the phase transition of Sb2S3, with a modulation range approaching 1 μm. Moreover, the designed absorber shows insensitivity to the angle of incidence. This study offers a feasible strategy for developing Sb2S3-integrated metasurface perfect absorbers with potential applications in selective thermal emitters and bolometers.