基于相变材料超表面的光学调控  

Tunable metasurfaces based on phase-change materials

作　　者：严巍 王纪永 曲俞睿 李强[3] 仇旻 Yan Wei;Wang Ji-Yong;Qu Yu-Rui;Li Qiang;Qiu Min((Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province,School of Engineering,Westlake University,Hangzhou 310024,China;Institute of Advanced Technology,Westlake Institute for Advanced Study,Hangzhou 310024,China;(State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310007,China)

机构地区：[1]西湖大学工学院,浙江省3D微纳加工和表征研究重点实验室,杭州310024 [2]浙江西湖高等研究院,前沿技术研究所,杭州310024 [3]浙江大学光电科学与工程学院,现代光学仪器国家重点实验室,杭州310007

出　　处：《物理学报》2020年第15期96-115,共20页Acta Physica Sinica

基　　金：国家重大科研仪器设备研制专项(批准号:61927820);国家重点研发计划(批准号:2017YFA0205700,2017YFE0100200);国家自然科学基金(批准号:61975181,61775194,61950410608);国家自然科学基金青年科学基金(批准号:61905200)资助的课题.

摘　　要：超表面光学完美结合了传统的几何、物理光学理论和前沿的纳米技术,近年来引起科研工作者的广泛关注.在线性光学领域,它已广泛用于对光波的振幅、相位进行调控,如平面透镜、全息成像和热辐射器件等.在非线性光学领域,针对它在高次谐波生成、超快激光器等方面的研究工作也方兴未艾.本文分别从理论和应用角度,分析总结了国内外超表面光学调控方向的研究进展,重点介绍了利用相变材料实现动态光学调控的前沿研究工作,并讨论了未来发展前景以及需要解决的难题.Due to their superior ability to control light,metasurfaces,ultrathin two-dimensional metamaterials composed of subwavelength nanostructures,have attracted great attention in recent years.Exploring geometric and material freedom in designing elementary nanostructures and their ambient environment of metasurfaces enables versatile optical devices,such as planar metalenses,holographic imaging and thermal radiators.With phase-change materials(PCMs)such as GeSbTe and VO2 integrated into metasurfaces,the optical functionalities of metasurfaces can be flexibly tuned by exploiting the phase transitions of PCMs induced by external stimuli,thereby opening up new directions and perspectives for dynamic tunable metamasurfaces.In this article,we review the recent progress of tunable metasurfaces based on PCMs,analyze their underlying working mechanisms and highlight their important applications.We conclude this review by bringing our perspectives on challenges and future directions in this field.

关 键 词：超表面 相变材料 纳米光子学 动态调控 

分 类 号：TB34[一般工业技术—材料科学与工程]