应用于频率转换技术的有机非线性材料MNA的结构与性能研究

Study on MNA Structure and Property of Organic Nonlinear Materials for Frequency Transformation Technology

本文主要论述了激光作用于非线性介质产生二次倍频转换效应的原理及有机非线性材料形成高极化率值激射非线性极化波的起因。硝基苯胺类衍生物ＭＮＡ化合物，因其具有独特的分子结构，在分子两端带有给电和受电基团，共轭极化效应使得π电荷发生偏移形成较大的分子偶极矩和较高的二阶非线性极化系数，外光场作用时给出很强的绿色光源信号。

It is mainly discussed in this paper that the theory of producing SHG effect acted by laser on the nonlinear medium and the initiation of emitting nonlinear polar wave for the nonlinear organic material forming high polarization efficient.The MNA compound of nitroaniline derivative,which has the unique molecular structure with the donor and acceptor group on the two side of the molecule,is given the conjugated polar effect so that the deviation of π electron produces the large molecular dipoile moment and second monlinear polar efficient,moreover shows the stronger green light signal while the action of the outside optical field.