分散橙3掺杂聚合物薄膜的全光极化特性及其驰豫过程研究  

Research on all-optical poling properties and relaxation process for the PMMA doped with disperse orange 3

作　　者：李慧[1] 王文军[1] 高学喜[1] 刘云龙[1] 孙彦星[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,聊城252059

出　　处：《原子与分子物理学报》2010年第1期123-127,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10874063);山东省自然科学基金项目(Y2007A34);山东省教育厅科技发展计划(J07Y105);聊城大学青年科研基金课题

摘　　要：利用旋涂法制备了分散橙3(DO3)/PMMA主客体掺杂薄膜,对其吸收谱、厚度和折射率进行了测量,并采用全光极化的方法对薄膜的二阶非线性光学特性进行了研究.实验结果表明,随着厚度的增加其二阶非线性先增强后减弱,d_(33)最大值约为0.827×10^(-2)pm/V.对极化饱和后的驰豫情况进行了分析,发现不同厚度薄膜的驰豫时间不同,这是由于薄膜中偶氮含量和厚度的不同,分子间的相互作用对顺反异构逆过程的快慢有较大的影响.The PMMA doped DO3 films were prepared by using spin coating method. The absorption spectra, the film thickness and the indexes of refraction were measured. The second-order nonlinear optical characteristics was investigated by using second harmonic generation method after all-optical poling. The experimental results show that the second order nonlinear optical coefficient d33 is sensitive to the thickness. The maximum is about d33 =0. 827 ×10^-2pm/V. It has different relaxation time for different thickness films. The azo molecules interaction has great influence on the speed of cis-to trans isomerization process.

关 键 词：偶氮化合物 主客体掺杂 全光极化 驰豫 

分 类 号：O484.4[理学—固体物理]