Electrically tunable helicity of cholesteric heliconical superstructure [Invited]  

作　　者：Conglong Yuan Wenbin Huang Xiaoqian Wang Dong Shen Zhigang Zheng 袁丛龙;黄文彬;王骁乾;沈冬;郑致刚(Department of Physics,East China University of Science and Technology,Shanghai 200237,China;School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China;Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program,Kent State University,Kent,Ohio 44242,USA)

机构地区：[1]Department of Physics,East China University of Science and Technology,Shanghai 200237,China [2]School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China [3]Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program,Kent State University,Kent,Ohio 44242,USA

出　　处：《Chinese Optics Letters》2020年第8期22-27,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61822504 and 51873060);the Shanghai Rising Star Program(No.17QA1401100);the Fundamental Research Funds for the Central Universities(No.JKM012016032).

摘　　要：The dynamic manipulation of the helicity in a cholesteric helical superstructure could enable precise control over its physical and chemical properties, thus opening numerous possibilities for exploring multifunctional devices.When cholesteric material satisfies the sufficiently small bending elastic effect, an electrically induced deformation named the cholesteric heliconical superstructure is formed. Through theoretical and numerical analysis, we systematically studied the tunable helicity of the heliconical superstructure, including the evolution of the corresponding oblique angle and pitch length. To further confirm the optical properties, Berreman’s 4 × 4 matrix method was employed to numerically analyze the corresponding structure reflection under the dual stimuli of chirality and electric field.

关 键 词：cholesteric liquid crystal heliconical superstructure tunable reflection band electro-optical materials 

分 类 号：O753.2[理学—晶体学]