偶氮类电光聚合物薄膜非线性定量研究  

Investigation on the Second-order Nonlinearities of Electro-optic Polymeric Thin Films

作　　者：秦志辉[1] 房昌水[1] 潘奇伟[1] 程秀凤[1] 顾庆天[1] 余金中[2] 

机构地区：[1]山东大学晶体材料研究所,山东济南250100 [2]中国科学院半导体研究所,集成光电子国家重点实验室,北京100083

出　　处：《光电子．激光》2002年第10期1013-1017,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目 (69990 5 40)

摘　　要：介绍了主客掺杂 NAEC/ PMMA电光极化聚合物薄膜的制备方法 ,测得其紫外可见吸收光谱和在10 6 4 nm波长下的二阶非线性系数χ( 2 )33,为 2 3.6 pm / V;采用两态模型 ,对χ( 2 )33进行了理论估算 ,作出了其色散曲线 ,得到理论值与实验值符合较好的结论。估算极化电场强度为 2 .6 38MV/ cm。The polymethyl methacrylate (PMMA) guest-host polymer film doped with novel nonlinear optical (NLO) chromophore (4´-nitrobenzene)-3-azo-9-ethylcarbazole (NAEC) was fabricated by spin coating and then poled by corona-onset poled at elevated temperature (COPET). The UV-visible absorption spectra of the polymer thin film before and after being poled were determined by HITACHI U-3500 spectrometer. By second harmonic generation (SHG) experimental setup, the macroscopic second-order NLO coefficient X33(2) was measured as 23.6 pm/V. Using the two-level model, the dispersion of X33(2) was evaluated for the polymer thin film. The poling electric field strength EP was calculated as 2.638 MV/cm.

关 键 词：偶氮类 电光聚合物 薄膜 非线性 定量 薄膜光学性质 光电子器件 波分复用 

分 类 号：TN929.1[电子电信—通信与信息系统] O484[电子电信—信息与通信工程]