摘要
研究了施受体型偶氮苯衍生物掺杂聚甲基丙烯酸甲酯（ＰＭＭＡ）薄膜的非共振三阶非线性，比较分子结构与材料的三阶非线性关系，得知越大的三阶非线性对应分子内越强的给受电子能力，在苯环上接上一个侧链基团可以增加分子的偶极矩，即增加了材料的三阶非线性。研究结果证明，材料三阶非线性主要源于光致顺反异构过程中偶氮分子的重新取向。
The experimental results for the nonresonant third order nonlinearity of the polymer films doped with acceptor donor azobenzene derivatives are reported. Comparison of both third order nonlinearity of the samples and the molecular structure of azobenzene derivatives are performed. It is found that a larger third order nonlinearity corresponds to a stronger acceptor and donor electron capability in the molecules, and attaching the side group to the benzene ring may increase the molecular dipole moment, hence the third order nonlinear susceptibility. It is demonstrated that third order nonlinearity of the samples is produced mainly from molecular reorientation of photoinduced cis trans isomerization.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1998年第10期914-918,共5页
Chinese Journal of Lasers
基金
黑龙江省自然科学基金
关键词
施受体型
偶氮苯衍生物
掺杂
PMMA薄膜
acceptor donor azobenzene derivatives, nonresonant third order nonlinearity, PMMA films
