Chiral plasmonics and enhanced chiral light-matter interactions  

作　　者：Wei Du Xinglin Wen Davy Gerard Cheng-Wei Qiu Qihua Xiong 

机构地区：[1]Division of Physics and Applied Physics,School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore 637371,Singapore [2]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [3]Light,Nanomaterials,Nanotechnologies(L2n),Institut Charles Delaunay,CNRS,Universite de Technologie de Troyes,Troyes 10004,France [4]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117583,Singapore [5]MajuLab,International Joint Research Unit UMI 3654,CNRS,Universite Cote d'Azur,Sorbonne Universite,National University of Singapore,Nanyang Technological University,Singapore 637371,Singapore [6]NOVITAS,Nanoelectronics Center of Excellence,School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《Science China(Physics,Mechanics & Astronomy)》2020年第4期62-72,共11页中国科学：物理学、力学、天文学（英文版）

基　　金：the Singapore National Research Foundation-Agence Nationale de la Recherche(Grant No.NRF2017-NRF-ANR0052DCHIRAL).

摘　　要：Chirality, which describes the broken mirror symmetry in geometric structures, exists macroscopically in our daily life as well as microscopically down to molecular levels. Correspondingly, chiral molecules interact differently with circularly polarized light exhibiting opposite handedness(left-handed and right-handed). However, the interaction between chiral molecules and chiral light is very weak. In contrast, artificial chiral plasmonic structures can generate "super-chiral" plasmonic near-field, leading to enhanced chiral light-matter(or chiroptical) interactions. The "super-chiral" near-field presents different amplitude and phase under opposite handedness incidence, which can be utilized to engineer linear and nonlinear chiroptical interactions. Specifically,in the interaction between quantum emitters and chiral plasmonic structures, the chiral hot spots can favour the emission with a specific handedness. This article reviews the state-of-the-art research on the design, fabrication and chiroptical response of different chiral plasmonic nanostructures or metasurfaces. This review also discusses enhanced chiral light-matter interactions that are essential for applications like chirality sensing, chiral selective light emitting and harvesting. In the final part, the review ends with a perspective on future directions of chiral plasmonics.Chirality, which describes the broken mirror symmetry in geometric structures, exists macroscopically in our daily life as well as microscopically down to molecular levels. Correspondingly, chiral molecules interact differently with circularly polarized light exhibiting opposite handedness(left-handed and right-handed). However, the interaction between chiral molecules and chiral light is very weak. In contrast, artificial chiral plasmonic structures can generate "super-chiral" plasmonic near-field, leading to enhanced chiral light-matter(or chiroptical) interactions. The "super-chiral" near-field presents different amplitude and phase under opposite handedness incidence, which can be utilized to engineer linear and nonlinear chiroptical interactions. Specifically,in the interaction between quantum emitters and chiral plasmonic structures, the chiral hot spots can favour the emission with a specific handedness. This article reviews the state-of-the-art research on the design, fabrication and chiroptical response of different chiral plasmonic nanostructures or metasurfaces. This review also discusses enhanced chiral light-matter interactions that are essential for applications like chirality sensing, chiral selective light emitting and harvesting. In the final part, the review ends with a perspective on future directions of chiral plasmonics.

关 键 词：CHIRALITY CHIRAL PLASMONICS CHIRAL light-matter interactions sensing 

分 类 号：O641.3[理学—物理化学]