Bichromatic optical switch of diffractive light from a BCT photonic crystal based on an azo component-doped HPDLC

被引：18

作者：

Li, Ming Shian ^{[1
]}

Fuh, Andy Ying-Guey ^{[1
,2
,3
]}

Liu, Jui-Hsiang ^{[4
]}

Wu, Shing-Trong ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Inst Electroopt Sci & Engn, Tainan 701, Taiwan

[3] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

[4] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 23期

关键词：

DISPERSED LIQUID-CRYSTAL; PHASE-TRANSITION; AZOBENZENE; GRATINGS; FILMS;

D O I：

10.1364/OE.20.025545

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This study demonstrates all optical switches between the four diffractive light levels of a body-centered tetragonal photonic crystal. The sample is based on holographic polymer-dispersed liquid crystals that are fabricated using a two-beam interference with multiple exposures. The switching mechanism bases on the effective index modulation of the PC that contains a liquid crystal/azo-dye mixture could be controlled by two pumping laser beams. The switching time between the blue-laser-pumped and the blue-and-green-laser-pumped levels is fast. The study also discusses the switching time of the various levels. (C) 2012 Optical Society of America

引用

页码：25545 / 25553

页数：9

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