Tailoring enhanced chiroptical effect with Fabry–Perot cavity-coupled sandwich chiral metamaterials  

作　　者：阳泽健 高福华 侯宜栋 胡德骄 庞霖 吴轩楠 

机构地区：[1]School of Physical Science and Technology, Sichuan University, Chengdu 610064, China [2]Key Laboratory for High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu 610064, China

出　　处：《Chinese Optics Letters》2016年第6期67-71,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61377054

摘　　要：Cavity-coupled plasmonic structure is demonstrated to be a simple and effective tool to manipulatelight,enhance the biosensing figure of merit, and control the polarization state. In this Letter, we demonstrate the tunability of the chiroptical effect of cavity-coupled chiral structure, i.e., sandwich chiral metamaterials（SCMs）, in whichradiation coupling dominates the interaction between particles. Two types of SCMs whose building blocks are 3D chiral and 2D chiral, respectively, are numerically studied. Distinct responses are observed in these two materials. The chiroptical effect can be effectively manipulated and enhanced in the 2D case, while the SCMs consisting of 3D chiral layers keep the chiroptical effecta constant. A theoretical analysis based on matrix optics is developed to explain the corresponding phenomena, which gives a reasonable agreement with numerical simulations.Cavity-coupled plasmonic structure is demonstrated to be a simple and effective tool to manipulatelight,enhance the biosensing figure of merit, and control the polarization state. In this Letter, we demonstrate the tunability of the chiroptical effect of cavity-coupled chiral structure, i.e., sandwich chiral metamaterials（SCMs）, in whichradiation coupling dominates the interaction between particles. Two types of SCMs whose building blocks are 3D chiral and 2D chiral, respectively, are numerically studied. Distinct responses are observed in these two materials. The chiroptical effect can be effectively manipulated and enhanced in the 2D case, while the SCMs consisting of 3D chiral layers keep the chiroptical effecta constant. A theoretical analysis based on matrix optics is developed to explain the corresponding phenomena, which gives a reasonable agreement with numerical simulations.

关 键 词：chiral sandwich figure optics numerically blocks fitting periodically spacing diagonal 

分 类 号：TB39[一般工业技术—材料科学与工程]