Electrically Reconfigurable Plasmonic Metasurfaces Based on Phase-Change Materials Sb<sub>2</sub>S<sub>3</sub>
Zhuoxuan Han, Chensheng Li, Tengzhang Liu, Nannan Hu, Zhiqin Fan, Yang Guo, Baoli Liu, Haifang Yang, Aizi Jin, Baogang Quan, Shibing Tian, Yang Yang, Geng Li, Xiaofeng Fan, S. Hu, Xin Huang, Changzhi Gu
Abstract
Phase-change materials (PCMs) are widely used in active optical metasurfaces due to their large refractive index contrast and fast and stable phase-change properties. In this paper, an electrically reconfigurable plasmonic metasurface based on the PCM Sb 2 S 3 is proposed to achieve nonvolatile, reversible, and fast optical modulation in the near-infrared range. The designed metasurface can redshift the surface plasmon resonance peak from 1320 to 1480 nm through the phase transition of Sb 2 S 3 from amorphous to crystalline states. In addition, we further experimentally design an electrically reconfigurable platform. In a 30 μm × 30 μm region, the phase state of Sb 2 S 3 with a thickness of 60 nm is successfully and reversibly changed, which contributes to the dynamic modulation of gold gratings. This work has great application potential in reconfigurable optical filters and communication systems and adaptive optical imaging and sensing.