掺杂偶氮苯聚合物光致异构Z扫描测量及其理论解释  

Z-scan measurements on photoisomerization of azobenzene polymer and their theoretical interpretation

作　　者：梁检初[1] 王晓生[1] 罗锻斌[1] 佘卫龙[1] 吴水珠[2] 曾钫[2] 唐天[2] 姚胜兰[2] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广州510275 [2]华南理工大学材料学院高分子系,广州510640

出　　处：《物理学报》2004年第10期3596-3600,共5页Acta Physica Sinica

基　　金：广东省科技计划项目 (批准号 :A10 60 2 0 1) ;广州市科技计划项目 (批准号 :980 5 0 5 );国家自然科学基金 (批准号 :5 0 173 0 0 7)资助的课题~~

摘　　要：用He_Ne激光对掺有偶氮苯聚合物DR 13的PMMA薄膜样品进行Z扫描研究 ,发现其折射率改变量与光强的关系存在着饱和效应 ,且线偏振光引起的折射率改变明显大于圆偏振光引起的折射率改变 .对于这些现象 。Z_scan experiments are performed on the azobenzene polymer (DR_13_PMMA) films with He_Ne laser. It is found that the relation between the change of refractive index of the sample and the light intensity behaves like a saturable effect, whose relative parameters are alterable with light intensity. It is also found that the change of refractive index induced by linearly polarized light is distinctly greater than that induced by circularly polarized light. The phenomena are explained by using the theory based on the effect of angular hole burning of photoisomerization.

关 键 词：Z扫描 光致异构 偶氮苯聚合物 圆偏振 折射率 改变量 线偏振光 HE-NE激光 DR 发现 

分 类 号：O4-34[理学—物理]