Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers  

作　　者：Seungmin Nam Wontae Jung Jun Hyuk Shin Su Seok Choi 

机构地区：[1]Department of Electrical Engineering,Pohang University of Science and Technology(POSTECH),Pohang,Korea

出　　处：《Light(Science & Applications)》2024年第6期1062-1074,共13页光（科学与应用)（英文版）

基　　金：supported by the Samsung Research Funding&Incubation Center of Samsung Electronics under Project Number SRFC-TC2103-01;Technology Innovation Program (20010690)funded by the Ministry of Trade,Industry and Energy (MOTIE,Korea).

摘　　要：Wavelength-tunable structural colors using stimuli-responsive materials,such as chiral liquid crystals(CLCs),have attracted increasing attention owing to their high functionality in various tunable photonic applications.Ideally,on-demand omnidirectional wavelength control is highly desirable from the perspective of wavelength-tuning freedom.However,despite numerous previous research efforts on tunable CLC structural colors,only mono-directional wavelength tuning toward shorter wavelengths has been employed in most studies to date.In this study,we report the ideally desired omnidirectional wavelength control toward longer and shorter wavelengths with significantly improved tunability over a broadband wavelength range.By using areal expanding and contractive strain control of dielectric elastomer actuators(DEAs)with chiral liquid crystal elastomers(CLCEs),simultaneous and omnidirectional structural color-tuning control was achieved.This breakthrough in omnidirectional wavelength control enhances the achievable tuning freedom and versatility,making it applicable to a broad range of high-functional photonic applications.

关 键 词：tuning TUNABLE directional 

分 类 号：TN2[电子电信—物理电子学] O43[机械工程—光学工程]