Reconfigurable phase-change metasurface for multifunctional control of chiral emission
Abstract
In optoelectronics and photonics, developing multifunctional light-emitting devices has become a prominent research area. However, achieving integration of polarization control, intensity modulation, and tunability within a single device presents a formidable challenge. Here, we report the design and implementation of a symmetric bound state in the continuum (BIC) realized by a metasurface composed of perovskite nanobars on a silica substrate. Through the incorporation of both in-plane and out-of-plane symmetries, the BIC undergoes a transformation into a chiral quasi-bound state in the continuum (q-BIC). The chiral q-BIC metasurface exhibits an intrinsic chiral response, characterized by nearly perfect circular dichroism of 0.96, a key property for chiral optical applications. Furthermore, the integration of Sb2S3 phase-change materials into the metasurface enables dynamic regulation of resonant circularly polarized emission wavelengths between 760 and 820 nm, with selective enhancement of right circularly polarized emission by 240-fold and suppression of left circularly polarized emission. Our chiral q-BIC metasurface enables single-device multi-function integration, offering a versatile and dynamically tunable platform for enhanced chiral optical responses across optoelectronics and photonics.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (16)
Cai Luo
Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University 1 , Qinhuangdao 066004,
Nannan Hu
Jianmei Li
Sha Hu
College of Physics, Henan University of Technology 3 , Zhengzhou 450001,
Ziyi Fu
Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University 1 , Qinhuangdao 066004,
Zhixiang Yu
Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University 1 , Qinhuangdao 066004,
Yanxue Hou
Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University 1 , Qinhuangdao 066004,
Aizi Jin
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences 2 , Beijing 100190,
Baogang Quan
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences 2 , Beijing 100190,
Shibing Tian
Haifang Yang
Geng Li
Department of Chemistry, State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong 999077, P. R. China
Xiaoyu Zhang
Xiaofeng Fan
Yang Guo
Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China
Changzhi Gu
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences 2 , Beijing 100190,