Liquid crystal gratings based on alternate TN and PA photoalignment

被引：93

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

页码：5384 / 5391

页数：8

共 30 条

[1] Analysis of nematic-liquid-crystal binary gratings with high spatial frequency [J].