文献类型：期刊文献

英文题名：Electrically/optically tunable photo-aligned hybrid nematic liquid crystal Dammann grating

作者：Wang, Xiao-Qian[1,2,3];Srivastava, Abhishek Kumar[4];Fan, Fan[5];Zheng, Zhi-gang[1];Shen, Dong[1];Chigrinov, Vladimir Grigorievich[4];Kwok, Hoi-Sing[4]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[3]Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China;[4]Hong Kong Univ Sci & Technol, State Key Lab Adv Displays & Optoelect Technol SK, Hong Kong, Hong Kong, Peoples R China;[5]Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micro Nano Optoelect Devices, Changsha 410082, Hunan, Peoples R China

年份：2016

卷号：41

期号：24

起止页码：5668

外文期刊名：OPTICS LETTERS

收录：;EI(收录号：20170303257506);WOS:【SCI-EXPANDED(收录号:WOS:000390403600013)】；

基金：East China University of Science and Technology (ECUST); Hong Kong University of Science and Technology (HKUST); Shanghai Pujiang Program (16PJ1402200); National Natural Science Foundation of China (NSFC) (61435008, 61575063); Competitive Research Grant (CERG) (614410, 612409).

语种：英文

外文关键词：Substrates - Alignment - Diffraction gratings

摘要：In this Letter, we disclose a Dammann grating (DG) based on the hybrid photo-aligned nematic liquid crystals (LCs). The LC cell is composed of two substrates, wherein the first substrate is treated to provide the homeotropic alignment, and the other substrate is set to provide an in-plane, patterned alignment with a mutually orthogonal easy axis in the neigh-boring alignment domains. Thus, the fabricated polarization independent DG generates an optical array of equally distributed energy, which is characterized by a diffraction efficiency of more than 58%, a response time < 1 ms, and the driving voltage 3 V/mu m. Furthermore, the optically active alignment layer provides the optical tunability and reconfigurability for the proposed DG. With these advantageous parameters, these DGs can be applied in modern applications. (C) 2016 Optical Society of America