聚偏二氟乙烯及其共聚物薄膜非线性光学研究进展

Research progress on nonlinear optics of polyvinylidene fluorid and its copolymers films

聚偏二氟乙烯(PVDF)及其共聚物薄膜拥有极佳的电活性、较高的衍射效率、显著的非线性光学效应,广泛应用于光电转换、光调控、光开关等光电功能器件等。本文简要介绍了近年来PVDF及其共聚物薄膜非线性光学研究方面的主要进展,指出该类薄膜共混、纳米掺杂、超薄化的发展方向。同时指出需从第一性原理-光子带隙计算着手研究其非线性光学性质,以高灵敏度Z-扫描及马克条纹法结合椭偏为主要测量方式。本综述将为该类薄膜的非线性光学研究及制备提供一定的参考。

Polyvinylidene fluoride(PVDF)and its copolymers films have been extensively used in photoelectric functional devices such as photoelectric conversion,optical regulation,optical switch.They are the most important polymeric ferroelectricity materials with excellent electro-active properties,high diffraction efficiency and significant nonlinear optical effect.We summarize the progress in nonlinear optical effect of polyvinylidene fluoride and its copolymers films both in domestic and foreign research within the last several years.We illustrate that the development direction of the films will be nanoscale-doping,blending modification and ultrathin.The nonlinear optical properties should be investigated by the first-principle and photonic band gap calculations,and measured by the means of the high sensitivity Z-scan,Marker fringe combing with ellipsometry.This study can provide an insight for the development and utilization for polyvinylidene fluoride and its copolymers films in future.