Ferroelectric Liquid Crystal Dammann Grating by Patterned Photoalignment

被引：21
作者：
Fan, Fan [1 ,2 ]
Yao, Lishuang [2 ]
Wang, Xiaoqian [3 ]
Shi, Liangyu [4 ]
Srivastava, Abhishek K. [4 ]
Chigrinov, Vladimir G. [4 ]
Kwok, Hoi-Sing [4 ]
Wen, Shuangchun [1 ]
机构：
[1] Hunan Univ, Sch Phys & Elect, Key Lab Micro Nanooptoelect Devices, Minist Educ, Changsha 410082, Hunan, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Peoples R China
[3] East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China
[4] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Partner State Key Lab PSKL Adv Displays & Optoele, Kowloon, Hong Kong, Peoples R China
来源：
CRYSTALS | 2017年 / 7卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ferroelectric liquid crystal; patterned photoalignment; dammann grating; ARRAY; GENERATION; LENS; ALIGNMENT; FILMS;
D O I：
10.3390/cryst7030079
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
In this article, a ferroelectric liquid crystal (FLC) dammann grating (DG) is demonstrated based on the patterned photoalignment technology. By applying low electric field (10 V) on the FLC DG, the grating can switch between a diffractive state with 7 x 7 optical spots array and a non-diffractive state, depending on the polarity of electric field. The FLC DG shows very fast switching speed with switching on time and off time to be only 81 mu s and 59 s respectively. Comparing with other fast LC DGs such as the ones based on blue phase LC or dual-frequency LC, the switching speed of the proposed FLC DG is about one order faster, which provides great potential and perspective for the FLC DG to be applied in a broad range of optical applications such as optical communication and beam shaping.
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收藏
页数：8
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