摘要
合成一种新型π共轭聚吡咯衍生物———聚吡咯 { 2 ,5 二 [(对硝基 )苯甲烯 ]} (PPNB) ,制备了该高分子的N 甲基 2 吡咯烷酮 (NMP)溶液和聚乙烯醇 (PVA)复合薄膜。用 5 32nm ,8ns脉冲激光作抽运光源 ,氦氖激光 (6 32 8nm ,CW)为探测光源 ,测量了该高分子的非线性光学响应过程 ,测得PPNB/NMP溶液和PPNB/PVA薄膜的激光诱导折射率的建立时间分别为 4μs和 5 μs,恢复时间分别为 30ms和 5ms。引起这种非线性效应的机制可能主要是热光非线性效应。
A novel π-conjugated polypyrrole derivative-poly{(pyrrole-2,5-diyl)[p-nitrobenylidene]} (PPNB) is synthesized. Its solution in N-Methyl-2-pyrrolidone (NMP) and its thin film combined with polyvinyl alcohol (PVA) are respectively prepared. With 532 nm, 8 ns laser pulse as pumping beam and He-Ne laser beam (632.8 nm, CW) as probing light, the nonlinear optical response times of the PPNB solution and film are measured. The building-up times of the laser induced refractive index change of the PPNB/NMP solution and the PPNB/PVA film are measured to be 4 μs and 5 μs, respectively. Their recovering times are 30 ms and 5 ms, respectively. This optical nonlinear phenomenon may be mainly dominated by the thermo-optical nonlinear effect.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2002年第1期65-68,共4页
Chinese Journal of Lasers
基金
瞬态光学技术国家重点实验室基金
中国科学院院长基金资助项目
