Zhuoran Fang, Rui Chen, Johannes E Fröch, Quentin A A Tanguy, Asir Intisar Khan, Xiangjin Wu, Virat Tara, Arnab Manna, David Sharp, Christopher Munley, Forrest Miller, Yang Zhao, Sarah Geiger, Karl F Böhringer, Matthew S Reynolds, Eric Pop, Arka Majumdar
Active metasurfaces with tunable subwavelength-scale nanoscatterers are promising platforms for high-performance spatial light modulators (SLMs). Among the tuning methods, phase-change materials (PCMs) are attractive because of their nonvolatile, threshold-driven, and drastic optical modulation, rendering zero-static power, crosstalk immunity, and compact pixels. However, current electrically controlled PCM-based metasurfaces are limited to global amplitude modulation, which is insufficient for SLMs. Here, an individual-pixel addressable, transmissive metasurface is experimentally demonstrated using the low-loss PCM Sb2 Se3 and doped silicon nanowire heaters...
April 19, 2024: ACS Nano