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

页码：1643 / 1646

页数：4

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