Micro-patterned photo-aligned ferroelectric liquid crystal Fresnel zone lens

被引：52
|
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
来源：
OPTICS LETTERS | 2015年 / 40卷 / 08期
基金：
中国国家自然科学基金;
关键词：
ALIGNMENT; DIFFRACTION; FABRICATION;
D O I：
10.1364/OL.40.001643
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
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
引用
收藏
页码：1643 / 1646
页数：4
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