【摘要】 研究了偶氮共聚聚合物的光致双折射特性 ,利用幂指数和高斯函数拟合双折射过程中不同的物理过程 ,对各种不同的浓度、泵浦功率、主链运动及实验温度对双折射特性的影响进行了讨论 ,并在光致双折射过程中对样品的饱和回落进行了观察和分析 ,随着样品浓度的增加 ,尽管双折射的绝对值增大 ,但残留比例减小更多还原

【Abstract】 The properties of photo-induced birefringence in azobenzene copolymer are investigated. Biexponential and Gaussian function are combined to describe the build up of birefringence,which corresponding to different physical processes. The dependences of photo-induced birefringence on various factors is discussed such as concentration,pump power,host freedom of motion and operation temperature. Saturation Drop (SD) is observed and analyzed during the birefringence. Though the pure birefringence of high concentration is large with the concentration rise,the SD phenomenon becomes conspicuous and the residual percentage of birefringence becomes low.更多还原