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.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
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
关键词
偶氮化合物
主客体掺杂
全光极化
驰豫
azo compound, host-guest adulterant, all-optical poling, relaxation
