文献类型：期刊文献

英文题名：Light reconfigurable geometric phase optical element with multi-stable states

作者：Wang, Xiao-Qian[1]; Tam, Alwin Ming-Wai[1,2]; Yang, Wei-Qiang[1]; Liao, Engle[2]; Cheung, Ka Chun[2]; Hu, Wei[3]; Shen, Dong[1]; Chigrinov, Vladimir[2]; Kwok, Hoi-Sing[2]; Zheng, Zhi-gang[1]; Lu, Yanqing[3]; Li, Quan[4]

机构：[1] Department of Physics, East China University of Science and Technology, Shanghai, 200237, China; [2] State Key Laboratory on Advanced Displays and Optoelectronics Technologies, Hong Kong University of Science and Technology, Hong Kong, China; [3] National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Science, Nanjing University, Nanjing, 210093, China; [4] Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, United States

年份：2018

外文期刊名：arXiv

收录：EI(收录号：20200526648)

语种：英文

外文关键词：Geometry - Liquid crystals - Signal processing

摘要：We present the design methodology of a light reconfigurable geometric phase optical element with multi-stable diffraction efficiency states, enabled by a photoresponsive self-organized chiral liquid crystal. Experimental demonstration shows the device exhibits a broad diffraction efficiency tunable range that can be smoothly modulated under alternate stimulation of ultraviolet and green lights. Distinctive to previous designs, the regulation of diffraction efficiency fundamentally stems from the modulation of geometric phase together with dynamical phase retardation, and any intermediate diffractive state is memorized. Such multi-stability facilitates applications including energy-saving all-optical signal processing in classical and quantum level, and phase hologram for anti-counterfeit. Copyright ? 2018, The Authors. All rights reserved.