Liquid crystal gratings based on alternate TN and PA photoalignment

被引：91
|
作者：
Hu, Wei [1 ,2 ,3 ]
Srivastava, Abhishek [3 ]
Xu, Fei [1 ,2 ]
Sun, Jia-Tong [3 ]
Lin, Xiao-Wen [1 ,2 ]
Cui, Hong-Qing [4 ]
Chigrinov, Vladimir [3 ]
Lu, Yan-Qing [1 ,2 ]
机构：
[1] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Hong Kong Univ Sci & Technol, Ctr Display Res, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China
[4] Infovis Optoelect Crop, LCD R&D Ctr, Kunshan 215300, Peoples R China
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 05期
关键词：
SURFACE ALIGNMENT; FREQUENCY; LAYER; FILM;
D O I：
10.1364/OE.20.005384
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A diffraction grating is proposed by periodically defining the liquid-crystal director distribution to form alternate parallel aligned and twist nematic regions in a cell placed between two crossed polarizers. Based on the combined phase and amplitude modulation, both 1D and 2D tunable gratings are demonstrated. Low voltage ON/OFF switching of 1st order diffracted light with extinction ratio over 80 is achieved within a small voltage interval of 0.15 V-rms. Unique four-state feature of the cell is obtained and their applications in optical logic devices are discussed. (C) 2012 Optical Society of America
引用
收藏
页码：5384 / 5391
页数：8
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