REAL-TIME HOLOGRAPHY IN AZO-DYE-DOPED LIQUID-CRYSTALS

被引:136
作者
CHEN, AG
BRADY, DJ
机构
[1] Department of Electrical and Computer Engineering, Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL
关键词
D O I
10.1364/OL.17.000441
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
When exposed to an Ar laser at 514 nm, azo-dye molecules in a nematic liquid-crystal host undergo photoisomerization from trans-isomers to cis-isomers. The conformation change of the azo-dye molecules reorients liquid-crystal molecules. Reversible polarization holograms can be recorded dynamically by this effect, with a threshold intensity as low as 3.0 mW/cm2 and a response time from a few hundred microseconds to 100 ms, depending on the spatial frequency of the recorded grating.
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页码:441 / 443
页数:3
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