中国激光, 2002, 29 (1): 65, 网络出版: 2006-08-08
π共轭聚吡咯衍生物非线性响应时间的测量
Measurement of Nonlinear Optical Response Time of a π-conjugated Polypyrrole Derivative
聚吡咯-{2 5-二[(对硝基)苯甲烯]} 非线性光学响应时间 抽运-探测 poly{(pyrrole-2 5-diyl)[p-nitrobenylidene]} nonlinear optical response time pump-probe
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532 nm,8 ns脉冲激光作抽运光源,氦氖激光(632.8 nm,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4 μs和5 μs,恢复时间分别为30 ms和5 ms.引起这种非线性效应的机制可能主要是热光非线性效应.
Abstract
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.
姚保利, 任立勇, 侯洵, 汪敏强, 易文辉. π共轭聚吡咯衍生物非线性响应时间的测量[J]. 中国激光, 2002, 29(1): 65. 姚保利, 任立勇, 侯洵, 汪敏强, 易文辉. Measurement of Nonlinear Optical Response Time of a π-conjugated Polypyrrole Derivative[J]. Chinese Journal of Lasers, 2002, 29(1): 65.