Transient Reorientation of a Doped Liquid Crystal System under a Short Laser Pulse

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	Transient Reorientation of a Doped Liquid Crystal System under a Short Laser Pulse
	Li T ; Xiang Y ; Liu YK ; Wang J ; Yang SL
刊名	chinese physics letters
	2009
卷号	26 期号:8 页码:art. no. 086108
关键词	INDUCED FREEDERICKSZ TRANSITION AZO-DYE NONLINEARITY
ISSN号	0256-307x
通讯作者	li t china three gorges univ coll chem & life sci yichang 443002 peoples r china. e-mail address: frank_xiang68@yahoo.com.cn
中文摘要	the transient optical nonlinearity of a nematic liquid crystal doped with azo-dye dr19 is examined. the optical reorientation threshold of a 25-mu m-thick planar-aligned sample of 5cb using a 50 ns pulse duration 532 nm yag laser pulse is observed to decrease from 800 mj/mm(2) to 0.6 mj/mm(2) after the addition of 1 vol% azo dopant, a reduction of three orders of magnitude. when using a laser pulse duration of 10 ns, no such effect is observed. experimental results indicate that the azo dopant molecules undergo photoisomerization from trans-isomer to cis-isomer under exposure to light, and this conformation change reorients the 5cb molecules via intermolecular coupling between guest and host. this guest-host coupling also affects the azo photoisomerization process.
学科主题	半导体物理
收录类别	SCI
资助信息	national natural science foundation of china 10674033 natural science foundation of guangdong province 8151009001000055 science and technology program of guangdong province 2007b010600060 supported by the national natural science foundation of china under grant no 10674033 the natural science foundation of guangdong province (8151009001000055) and the science and technology program of guangdong province (2007b010600060).
语种	英语
公开日期	2010-03-08
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/7055]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Li T,Xiang Y,Liu YK,et al. Transient Reorientation of a Doped Liquid Crystal System under a Short Laser Pulse[J]. chinese physics letters,2009,26(8):art. no. 086108.
APA	Li T,Xiang Y,Liu YK,Wang J,&Yang SL.(2009).Transient Reorientation of a Doped Liquid Crystal System under a Short Laser Pulse.chinese physics letters,26(8),art. no. 086108.
MLA	Li T,et al."Transient Reorientation of a Doped Liquid Crystal System under a Short Laser Pulse".chinese physics letters 26.8(2009):art. no. 086108.