手性光学近场的研究进展  

Progress on chiral optical near fields

作　　者：程宇琼 贾世琪 肖惋月 李恒之 王书波 Yuqiong Cheng;Shiqi Jia;Wanyue Xiao;Hengzhi Li;Shubo Wang(Department of Physics,City University of Hong Kong,Hong Kong 999077,China;City University of Hong Kong Shenzhen Research Institute,Shenzhen 518057,China)

机构地区：[1]香港城市大学物理学系,中国香港999077 [2]香港城市大学深圳研究院,深圳518057

出　　处：《科学通报》2024年第27期4025-4037,共13页Chinese Science Bulletin

基　　金：国家优秀青年科学基金(12322416)资助。

摘　　要：近场光学是探索光与物质相互作用中亚波长光场特性及应用的一门学科.手性光学近场因其丰富的物理现象和灵活的光场调控自由度成为亚波长光学和纳米光学的重要研究课题,近年来引发广泛关注.本文从光学近场的空间不均匀性出发,描述自旋轨道相互作用下倏逝波携带的反常动量和角动量性质,介绍手性光学近场的最新研究进展及其在近场光操纵和探测、非厄米光学、奇点光学和拓扑光学等领域的重要应用.Near-field optics plays an essential role in exploring the subwavelength optical characteristics of light-matter interactions.Due to its inhomogeneous nature,the spatial and polarization degrees of freedom in optical near fields can strongly couple with each other.This gives rise to various intriguing properties and phenomena of chiral optical near fields.The interaction between the chiral optical near fields and matter provides rich physical mechanisms for state-of-the-art applications,which enable both the efficient control of near-field characteristics using optical structures/devices and the flexible optical manipulation/detection of small particles.This review introduces the recent progress in the research of chiral optical near fields from the theoretical and applied aspects.In the past few years,the study of optical near fields has been extended from evanescent fields to arbitrary inhomogeneous structured fields,revealing the intriguing physics associated with the extraordinary spin and momentum properties and promoting the development of modern optics.The property of spin-momentum locking can be employed to realize near-field optical directional coupling,non-Hermitian exception points,and near-field directional sources,with broad applications in photonic integrated circuits and quantum information processing.The transfer of transverse momentum and angular momentum between the chiral optical near fields and particles can generate the abnormal lateral optical force and torque,providing new degrees of freedom for optical trapping,chirality sorting,and optomechanical device design.Analogous to the longitudinal spin,the transverse spin of light can also give rise to geometric phases due to the curvilinear trajectory of optical near fields or spatially varying anisotropy of materials,which paves the way for the onchip multiplexed optical manipulation.In addition,the interference of near fields can generate polarization singularities with unique properties in the real space.The interplay among the chiral near-fi

关 键 词：手性 光学近场 自旋轨道耦合 横向自旋 偏振奇点 

分 类 号：O43[机械工程—光学工程]