Optically switchable biphotonic photorefractive effect in dye-doped liquid crystal films

Mei Ru Lee, Jyun Ruei Wang, Chia-Rong Lee, Andy Y.G. Fuh

研究成果: Article

34 引文 (Scopus)

摘要

This study reports the optically swichable photorefractive (PR) effect induced in a biphotonic grating in the presence of an applied dc voltage, in an azo-dye-doped liquid crystal (LC) film. When one green light is switched on (off), the PR grating can be turned on (off) by irradiating an interference field generated by two linearly polarized red lights. Experimental results demonstrate that such a PR effect follows primarily from a biphotonic process, with two mechanisms-the generation of green light-induced space charges by trans-cis isomerization, and the suppression of the formation of space charges by the red light in cis-trans back isomerization. These mechanisms apply to the dark and bright fringes of the red interference field, respectively. A spatially inhomogeneous space-charge field is then established to modulate the orientation of LCs, forming the PR grating in the presence of a dc voltage. Strong coupling of the two red lights is observable and measured dynamically during the formation of the PR grating in this study.

原文English
頁(從 - 到)5822-5824
頁數3
期刊Applied Physics Letters
85
發行號24
DOIs
出版狀態Published - 2004 十二月 13

指紋

doped crystals
dyes
liquid crystals
gratings
space charge
isomerization
luminaires
interference
electric potential
retarding

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

引用此文

Lee, Mei Ru ; Wang, Jyun Ruei ; Lee, Chia-Rong ; Fuh, Andy Y.G. / Optically switchable biphotonic photorefractive effect in dye-doped liquid crystal films. 於: Applied Physics Letters. 2004 ; 卷 85, 編號 24. 頁 5822-5824.
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Optically switchable biphotonic photorefractive effect in dye-doped liquid crystal films. / Lee, Mei Ru; Wang, Jyun Ruei; Lee, Chia-Rong; Fuh, Andy Y.G.

於: Applied Physics Letters, 卷 85, 編號 24, 13.12.2004, p. 5822-5824.

研究成果: Article

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