Optically induced anisotropy of third-order susceptibility in azo-dye polymers

被引：17

作者：

Churikov, VM ^{[1
]}

Hsu, CC ^{[1
]}

机构：

[1] Natl Chung Cheng Univ, Dept Phys, Chiayi 621, Taiwan

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2001年 / 18卷 / 11期

关键词：

D O I：

10.1364/JOSAB.18.001722

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Near-resonant optical pumping is applied for encoding the anisotropy of third-order susceptibility chi ((3)) in a Disperse Red 1 poly (methyl methacrylate) polymer thin film. The encoding process involves one- or two-photon excitation that results in trans-cis isomerization of azo molecules, Third-harmonic generation from the sample is used to probe the chi ((3)) anisotropy. We demonstrate large reversible variations of the third-harmonic generation (several times in intensity) in a sample pumped by the second harmonic of a Nd:YAG laser or a cw He-Cd laser. A microscopic model, which includes mechanisms for angular hole burning and molecular reorientation, is presented. The model is in good qualitative agreement with the experimental results. (C) 2001 Optical Society of America.

引用

页码：1722 / 1731

页数：10

共 16 条

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