文献类型：期刊文献

英文题名：Micro-patterned photo-aligned ferroelectric liquid crystal Fresnel zone lens

作者：Srivastava, A. K.[1];Wang, X. Q.[1,2];Gong, S. Q.[2];Shen, D.[2];Lu, Y. Q.[3,4];Chigrinov, V. G.[1];Kwok, H. S.[1]

机构：[1]Hong Kong Univ Sci & Technol, State Key Lab Adv Displays & Optoelect Technol, Hong Kong, Hong Kong, Peoples R China;[2]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[3]Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[4]Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

年份：2015

卷号：40

期号：8

起止页码：1643

外文期刊名：OPTICS LETTERS

收录：;EI(收录号：20160701940583);WOS:【SCI-EXPANDED(收录号:WOS:000353920100007)】；

基金：This work is supported by Partner State Key Laboratory on Advanced Displays and Optoelectronics Technologies HKUST, and the National Natural Science Foundation of China (61490714 and 61435008).

语种：英文

外文关键词：Ferroelectricity - Liquid crystals - Micromachining

摘要：In this Letter, we disclose a fast switchable Fresnel zone lens (FZL) by confining the ferroelectric liquid crystals (FLCs) in multiple microscopically defined photo-aligned alignment domains. The photo-alignment (PA) offers good control on the anchoring energy (W) by mean of irradiation doses (ID) and thus excellent alignment for FLCs. Two operational modes of the FLCFZL, i.e., FOCUS/OFF and FOCUS/DEFOCUS, were demonstrated. The proposed diffracting element provides fast response time, high diffraction efficiency (eta), with saturated electro-optical (EO) operations up to high frequency (approximate to 2 kHz). Thus, the proposed FLCFZLs with simple fabrication open several opportunities to improve the quality of existing devices and to find new applications. (C) 2015 Optical Society of America