Photorefractive effects observed in 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium toluene-p-sulfonate

被引：11
作者：
Follonier, S
Bosshard, C
Pan, F
Gunter, P
机构：
[1] Nonlinear Optics Laboratory, Institute of Quantum Electronics, Swiss Fed. Institute of Technology
来源：
OPTICS LETTERS | 1996年 / 21卷 / 20期
关键词：
D O I：
10.1364/OL.21.001655
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We measured, for the first time to our knowledge, a net two-beam coupling gain in an organic crystal. Our photorefractive measurements were carried out in nominally pure organic crystals of 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium toluene-p-sulfonate (DAST). Because of its large electro-optic coefficient, r(11) = 83 pm/V at lambda = 750 nm, and a photoconductivity of up to sigma = 6.7 x 10(-12) Omega(-1) cm(-1) at intensity I = 570 mW/cm(2), DAST showed a gain of 2.2 cm(-1) for an absorption of alpha = 1.8 cm(-1). With grating buildup times below 1 s at light intensities of 300 mW/cm(2), DAST is a promising candidate for photorefractive applications in the near infrared. (C) 1996 Optical Society of America
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页码：1655 / 1657
页数：3
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