摘要
最近，导电高聚物作为具有快速响应和大的Ｘ～（３） 的非线性光学材料的希望引超了足够的重视，这是因为它可能在快速光开关、非线性记忆和光晶体管等上获得应用．导电高聚物的三阶非线性光学系数Ｘ～（３），在１０～（－９）─１０～（－１２）ｅｓｕ范围之内，并强烈地依赖于主链结构、高聚物链的构向和取向、共轭长度、取代基种类、掺杂程度和聚合条件等．所观察到的非线性光学效应是本征的，它可能与孤子、极化子和双极化子的光激发有关．本文讨论导电高聚物的三阶非线性光学效应的特性、来源、分子设计、研究进展和展望．
The promise of conducting polymers exhibiting fast response nonlinear optical behaviour with large X^(3) has recently aroused great interest because of their application in fast optical switches, nonlinear memories and optical transistors. It has been reported that the third harmonic susceptibility X^(3) of conducting polymers is in the 10^(-9) 10^(-12) esu regime depen-ding on the structure of the main chain, conformation and direction of the polymer chain, conjugation length, substitution, doping level, polymerization conditions etc. It has been suggested that the nonlinear optical properties observed in conducting polymers are intrinsic and might be related to photoexcitation of solitons, polarons and bipolarons. In this review the characteristics, origin, molecular design, research progress and prospect of third order nonlinear optical effects of conducting polymers are discussed.
出处
《物理》
CAS
北大核心
1992年第5期267-270,共4页
Physics
基金
国家科学技术委员会资助项目
