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介绍了在偶氮液晶聚合物薄膜P CN中发现的非线性光致双折射现象 ,给出了非线性光致双折射实验的具体结果 .采用Z 扫描技术验证了光致双折射的非线性过程本质 ,测量了P CN介质薄膜的非线性吸收系数 .讨论了光致双折射涉及的异构化微观机理 ,并在此基础上提出了非线性光 光异构化实现光致双折射的方法
The nonlinear photoinduced birefringence phenomenon found in the azo liquid crystal polymer film P CN is introduced and the specific results of the nonlinear photoinduced birefringence experiment are given. The non-linear process of photoinduced birefringence The nonlinear absorption coefficient of P CN dielectric thin film was measured.The microscopic mechanism of isomerization induced by photo induced birefringence was discussed.And the method of photobleaching birefringence by nonlinear photoisomerization