基于光控取向技术的液晶元器件研究  

Liquid crystal element based on photoalignment technology

作　　者：赵世宇 李佼洋 焉力恒[1] 王福娟 王嘉辉 项颖[3] 蔡志岗 ZHAO Shiyu;LI Jiaoyang;YAN Liheng;WANG Fujuan;WANG Jiahui;XIANG Ying;CAI Zhigang(School of Physics,Sun Yat-sun University,Guangzhou 510275,China;National Demonstration Center for Experimental Physics Education(Sun Yat-sun University),Sun Yat-sun University,Guangzhou 510275,China;School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]中山大学物理学院,广东广州510275 [2]中山大学物理学国家级实验教学示范中心(中山大学),广东广州510275 [3]广东工业大学信息工程学院,广东广州510006

出　　处：《物理实验》2023年第8期13-21,共9页Physics Experimentation

基　　金：国家自然科学基金面上项目(No.11774070);2020年广东省高等教育教学改革项目(粤教高函〔2020〕20号);中山大学本科教学质量工程项目(中大教务〔2022〕20号)。

摘　　要：从液晶取向技术展开,介绍了液晶几何相位的基本原理和光控取向液晶元器件的制作工艺,通过实验制备了液晶透镜和液晶双焦点透镜样品,并在衍射光路中演示了其效果.相比于传统光学透镜,制备的液晶透镜和双焦点透镜的焦距和焦点位置可以按需预设在液晶样品中,其中双焦点透镜可实现焦距相等和焦距不相等的情况.此外,本实验制备的液晶样品还具备偏振控制的功能,通过调节入射光的偏振态可以切换目标光场的分布.Based on the basic liquid crystal orientation technique,the principle of liquid crystal geometric phase and fabrication of photoalignment liquid crystal element were introduced.Liquid crystal lens and liquid crystal bifocal lens were fabricated and their diffraction phenomena were verified.Compared with traditional optical lenses,the focal length and focal position of the liquid crystal lens and bifocal lens fabricated in this experiment could be preset in the liquid crystal sample on demand,and also the bifocal lens could also realize two equal focal lengths and two unequal focal lengths.Additionally,the liquid crystal samples also had the polarization-controlled function.The distribution of the target light field could be adjusted by the polarization state of the incident light.

关 键 词：液晶 光控取向 光场调控 液晶透镜 

分 类 号：O436.3[机械工程—光学工程] O493.3[理学—光学]