在4- N，N -二甲基氨基-4'- N'-甲基-二苯乙烯基甲苯磺酸盐中观察到的光折变效应。

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

作者信息

Follonier S, Bosshard C, Pan F, Günter P

出版信息

Opt Lett. 1996 Oct 15;21(20):1655-7. doi: 10.1364/ol.21.001655.

DOI:10.1364/ol.21.001655

PMID:19881757

Abstract

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) ?(-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.

摘要

据我们所知，我们首次测量了有机晶体中的净双光束耦合增益。我们的光折变测量是在标称纯净的4-N，N-二甲基氨基-4'-N'-甲基-二苯乙烯基甲苯磺酸盐（DAST）有机晶体中进行的。由于其在λ = 750 nm时具有较大的电光系数r(11) = 83 pm/V，并且在强度I = 570 mW/cm²时光电导率高达σ = 6.7×10⁻¹² Ω⁻¹ cm⁻¹，对于α = 1.8 cm⁻¹的吸收，DAST显示出2.2 cm⁻¹的增益。在300 mW/cm²的光强下，光栅建立时间低于1 s，DAST是近红外光折变应用的一个有前途的候选材料。