液晶与显示2024，Vol.39Issue(12)：1657-1666,10.DOI:10.37188/CJLCD.2024-0252
基于双手性液晶超结构的自旋解耦彩色全息
Spin-decoupled color holography via bi-chiral liquid-crystal superstructures
摘要
Abstract
As the demand for information capacity and color quality continues to increase,color optical holography has garnered significant attention and is now widely applied in areas such as color displays,augmented reality(AR)/virtual reality(VR)and information encryption.However,most current color holography techniques are based on metasurfaces and similar systems,achieving color holography in soft matter,specifically those represented by liquid crystals,remains challenging.In this study,we propose a bi-chiral cholesteric liquid crystal(CLC)superstructure,which enables circular polarization multiplexed color holography through the liquid crystal photoalignment and Bragg reflection band modulation techniques.By employing washout and refill steps involving a surface-initiated polymerization process,alongside liquid crystal photopatterning technology,we achieve spin-decoupled geometric phase,enabling the independent phase modulation of left-and right-handed circularly polarized light.The geometric phase and the resultant holographic image are generated exclusively when the incident light's polarization and wavelength precisely match those of the CLC.Through the independent control of Bragg reflection bands in left-and right-handed CLCs,multiple holographic images are successfully generated on the same diffraction plane,resulting in the tunable and multiplexed color holography.The proposed spin-decoupled color holography via bi-chiral liquid crystal superstructures holds great promise in advanced displays,optical encryption and multi-channel communication.关键词
彩色全息/液晶/手性超结构/几何相位/光复用Key words
color holography/liquid crystals/chiral superstructures/geometric phases/light multi-plexing分类
数理科学引用本文复制引用
孙睿,刘思嘉,陈鹏,陆延青..基于双手性液晶超结构的自旋解耦彩色全息[J].液晶与显示,2024,39(12):1657-1666,10.基金项目
国家重点研发计划(No.2021YFA1202000) （No.2021YFA1202000）
国家自然科学基金(No.62222507,No.62175101) Supported by the National Key R&D Program of China(No.2021YFA1202000) （No.62222507,No.62175101）
National Natural Science Foundation of China(No.62222507,No.62175101) （No.62222507,No.62175101）
