Dynamic multifunctional all-chalcogenide metasurface filter with ultra-multiple cycles  

作　　者：Mingjie Zhang Zhanbo Wen Zhenqi Huang Yuanzhi Chen Minsi Lin Yue Shen Yan Li Shunyu Yao Zhen Li Zhenqiang Chen Zhaohui Li 

机构地区：[1]Jinan University,College of Physics and Optoelectronic Engineering,Guangzhou,China [2]Shanghai Institute of Technology,School of Material Science and Engineering,Shanghai,China [3]Sun Yat-sen University,School of Electrical and Information Technology,Guangzhou,China

出　　处：《Advanced Photonics Nexus》2024年第5期120-129,共10页先进光子学通讯（英文）

基　　金：supported by the Program of Marine Economy Development Special Fund under Department of Natural Resources of Guangdong Province(Grant No.GDNRC[2023]23);the National Natural Science Foundation of China(Grant Nos.62005098 and 61935013);the General Items of Guangzhou Science and Technology Plan Project(PhD Young Scientists and Technologists category)(Grant No.202201010320);the Fundamental Research Funds for the Central University(Grant No.11623415).

摘　　要：Dynamically tunable metasurfaces employing chalcogenide phase-change materials(PCMs)such as Ge_(2)Sb_(2)Te_(5)alloys have garnered significant attention and research efforts.However,the utilization of chalcogenide PCMs in dynamic metasurface devices necessitates protection,owing to their susceptibility to volatilization and oxidation.Conventional protective layer materials such as Al_(2)O_(3),TiO_(2),and SiO_(2)present potential drawbacks including diffusion,oxidation,or thermal expansion coefficient mismatch with chalcogenide PCMs during high-temperature phase transition,severely limiting the durability of chalcogenide PCM-based devices.In this paper,we propose,for the first time to our knowledge,the utilization of chalcogenide glass characterized by high thermal stability as a protective material for chalcogenide PCM.This approach addresses the durability challenge of current dynamic photonic devices based on chalcogenide PCM by virtue of their closely matched optical and thermal properties.Building upon this innovation,we introduce an all-chalcogenide dynamic tunable metasurface filter and comprehensively simulate and analyze its characteristics.This pioneering work paves the way for the design and practical implementation of optically dynamically tunable metasurface devices leveraging chalcogenide PCMs,ushering in new opportunities in the field.

关 键 词：metasurface chalcogenide glass Ge_(2)Sb_(2)Te_(5) phase-change materials 

分 类 号：O43[机械工程—光学工程]