The nonlinear optical property and photoinduced anisotropy of a novel azobenzene-containing fluorinated polyimide

被引：23
|
作者：
He, T. C. [1 ]
Wang, C. S. [1 ]
Pan, X. [1 ]
Zhang, C. Z. [2 ]
Lu, G. Y. [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
[2] Nanjing Univ, State Key Lab Coordinat Chem, Dept Chem, Nanjing 210093, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2009年 / 94卷 / 04期
基金：
美国国家科学基金会;
关键词：
DOPED POLYMER; AZO-DYES; BIREFRINGENCE; STORAGE; FILMS; GRATINGS; SYSTEMS;
D O I：
10.1007/s00340-009-3369-3
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel azobenzene-containing fluorinated polyimide was synthesized. The nonlinear optical property and photoinduced birefringence of a polyimide thin film were investigated. Large third-order nonlinear refraction (n (2)=-4.49x10(-11) cm(2)/W) was observed in the polyimide thin film by carrying out Z-scan measurement. The polyimide thin film exhibited larger nonlinear refraction than that of a mono-azo dye doped PMMA thin film (n (2)=-1.63x10(-12) cm(2)/W). The photoinduced birefringence of the polyimide thin film (a-mu n similar to 10(-2)) under different pump intensities was investigated; it was much larger than that of the mono-azo dye doped PMMA thin film (a-mu n similar to 10(-3)). Moreover, the time constants for birefringence growth and relaxation processes were determined.
引用
收藏
页码：653 / 659
页数：7
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