Real-time observation of liquid crystal molecular directions based on a snapshot polarimeter  

作　　者：马靖 许灿华 姚仰光 

机构地区：[1]College of Physics and Information Engineering, Fuzhou University, Fuzhou 350002, China [2]College of Mathematics and Computer Science, Fuzhou University, Fuzhou 350002, China

出　　处：《Chinese Optics Letters》2017年第6期58-62,共5页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Fund of China under Grant No.61177072

摘　　要：The polarization state of transmitted light is linked to liquid crystal（LC） molecular distribution. The dynamic behavior of a twisted nematic LC molecule is measured with a home-built 10 k Hz snapshot polarimeter. Only the transient molecule rotations are observed when the external voltage changes, and the molecules return to their original orientations quickly even when high voltage is applied. Our observations cannot be attributed to the traditional electro-optic effect. The invalidation of the static external field indicates the shielding effect of redistributing impurity ions in an LC cell.The polarization state of transmitted light is linked to liquid crystal（LC） molecular distribution. The dynamic behavior of a twisted nematic LC molecule is measured with a home-built 10 k Hz snapshot polarimeter. Only the transient molecule rotations are observed when the external voltage changes, and the molecules return to their original orientations quickly even when high voltage is applied. Our observations cannot be attributed to the traditional electro-optic effect. The invalidation of the static external field indicates the shielding effect of redistributing impurity ions in an LC cell.

关 键 词：impurity nematic return attributed shielding quickly directions optic twisted director 

分 类 号：O753.2[理学—晶体学] TH744.2[机械工程—光学工程]