文献类型：期刊文献

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

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

机构：[1]School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;[2]Beihang University Qingdao Research Institute,Qingdao 266101,China;[3]Physics Department,East China University of Science and Technology,Shanghai 200237,China;[4]Department of Medical Physics and Informatics,Bashkir State Medical University,Ufa 450008,Russia;[5]School of Physics and Optoelectronic Engineering,Foshan University,Foshan 528000,China;[6]State Key Laboratory on Advanced Displays and Optoelectronics Technologies,The Hong Kong University of Science and Technology,Hong Kong 999077,China;[7]Department of Theoretical Physics,Moscow Region State University,Mytishi 141014,Russia

年份：2020

卷号：18

期号：8

起止页码：2

中文期刊名：Chinese Optics Letters

外文期刊名：中国光学快报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；PubMed;

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

中文关键词：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 μs 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.