文献类型：期刊文献

英文题名：Ferroelectric liquid crystals for fast switchable circular Dammann grating [Invited]

作者：Guo, Qi[1,2];Liu, Tian[1,2];Wang, Xiaoqian[3];Zheng, Zhigang[3];Kudreyko, Aleksey[4];Zhao, Huijie[1,2];Chigrinov, V.[5,6,7];Kwok, Hoi-Sing[6]

机构：[1]Beihang Univ, Sch Instrumentat & Optoelect Engn, Beijing 100191, Peoples R China;[2]Beihang Univ, Qingdao Res Inst, Qingdao 266101, Peoples R China;[3]East China Univ Sci & Technol, Phys Dept, Shanghai 200237, Peoples R China;[4]Bashkir State Med Univ, Dept Med Phys & Informat, Ufa 450008, Russia;[5]Foshan Univ, Sch Phys & Optoelect Engn, Foshan 528000, Peoples R China;[6]Hong Kong Univ Sci & Technol, State Key Lab Adv Displays & Optoelect Technol, Hong Kong 999077, Peoples R China;[7]Moscow Reg State Univ, Dept Theoret Phys, Mytishi 141014, Russia

年份：2020

卷号：18

期号：8

外文期刊名：CHINESE OPTICS LETTERS

收录：;EI(收录号：20204709517067);WOS:【SCI-EXPANDED(收录号:WOS:000569164800011)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 61405009, 61875004, and 61705067), the Defense Industrial Technology Development Program (No. JCKY2019601C101), and the Shanghai Pujiang Program (16PJ1402200). The contribution of V. Chigrinov and A. Kudreyko was supported by the Russian Science Foundation (No. 20-19-00201).

语种：英文

外文关键词：ferroelectric liquid crystals; photo-alignment; fast switching; diffractive optical elements

摘要：Diffractive optical elements attract a considerable amount of attention, mainly due to their potential applications in imaging coding, optical sensing, etc. Application of ferroelectric liquid crystals (FLCs) with photoalignment technology in diffractive optical elements results in a high efficiency and a fast response time. In this study we demonstrate a circular Dammann grating (CDG) with a diffraction efficiency of 84.5%. The achieved response time of 64 Its is approximately two orders of magnitude faster than the existing response time of nematic liquid crystal devices. By applying a low electric field (V= 6 V) to the FLC CDG, it is switched between the eight-order diffractive state and the transmissive diffraction-free state.