文献类型：期刊文献

英文题名：Light-Driven Liquid Crystal Circular Dammann Grating Fabricated by a Micro-Patterned Liquid Crystal Polymer Phase Mask

作者：Wang, Xiaoqian[1];Wu, Saibo[1];Yang, Weiqiang[1];Yuan, Conglong[1];Li, Xiao[1];Liu, Zhen[1];Tseng, Manchun[2];Chigrinov, Vladimir G.[2];Kwok, Hoising[2];Shen, Dong[1];Zheng, Zhigang[1,3]

机构：[1]East China Univ Sci & Technol, Phys Dept, Shanghai 200237, Peoples R China;[2]Hong Kong Univ Sci & Technol, State Key Lab Adv Displays & Optoelect Technol SK, Hong Kong, Hong Kong, Peoples R China;[3]Kent State Univ, Liquid Crystal Inst, Kent, OH 44242 USA

年份：2017

卷号：9

期号：8

外文期刊名：POLYMERS

收录：;EI(收录号：20173404070830);WOS:【SCI-EXPANDED(收录号:WOS:000408747000076)】；

基金：This work is sponsored by Shanghai Pujiang Program (16PJ1402200); Shanghai Rising-Star Program (No. 17QA1401100); National Natural Science Foundation of China(NSFC) (Grant Nos. 61435008, 61575063, 61705067); State Key Laboratory on Advanced Displays and Optoelectronics Technologies, ECE Department, HKUST, Hong Kong. We would also like to thank Alwin Mingwai Tam for his precious suggestions on this work.

语种：英文

外文关键词：liquid crystals; LC polymer; light-driven; Dammann grating; photoalignment

摘要：As one of the diffractive optical elements, circular Dammann grating has shown its excellent versatility in practical applications. The electrically switchable Dammann grating has been extensively investigated; however, the research on the optically tunable circular Dammann grating has received less attention and reports on this subject have been insufficient in the past decade. In this paper, three-order and eight-order binary-phase liquid crystal circular Dammann gratings with two mutually orthogonal photo-induced alignments in every two adjacent alignment domains, fabricated by a micro-patterned liquid crystal polymer phase mask, are proposed to generate annular uniform-intensity patterns in the far field. A simple maskless optical tuning of an eight-order liquid crystal circular Dammann grating is demonstrated by controlling the polarization of an ultraviolet light as well as the energy dose. The proposed liquid crystal circular Dammann gratings with high efficiencies and desirable uniformities exhibit outstanding optical as well as electrical tunabilities, enabling the widespread prospective applications in adaptive photonic chips stimulated flexibly by only light or by the combination of light and electric field.