Studies on Nonlinear Optical Effects of Polymers.

有机材料的非线性光学效应最近引起了人们的极大关注，因为这些材料具有将激光波长改变为一半或三分之一的强大潜力。在不久的将来，这种效应将在光电子时代扮演非常重要的角色。两年来，我们一直在研究具有强非线性光学效应的新型聚合物和有机材料。在此期间，我们阐明了结构和光学非线性之间的关系，并在我们的理论基础上开发了新的聚合物和有机材料。研究结果如下：1.研究结果。从理论上阐明了三次谐波与有机结构的关系。根据该理论，我们发现一系列的聚二烯烃化合物表现出很强的THG.3。聚二烯烃(DSP)的光学损伤只受到比KDP高一个数量级的超高强度激光的影响。卡尔酮类药物显示出很强的二次谐波。其活性是无机材料中活性最高的LiNb&lt；O_3&GT；的8倍。

Nonlinear optical effects of organic materials have recenty attracted much attention because these materials have a strong potential to change wave length of laser beam into a half or one third. This effect is going to play a very important role in the optelectronic age in near future. We have been studying on new polymer and organic materials showing strong nonlenear optical effects for two years.During this research period we have elucidated relationship between structure and optical nonlinearity and developed new polymer and organic materials based on our theory. The results are as follows.1. The relationship between third harmonic generation (THG) and organic structure have been elucidated theoretically.2. According to the theory, we have found that a series of poly(diolefine) compounds showed strong THG.3. Optical damage of poly(diolefine) (DSP) suffers only very high intensity laser beam which is one order of magnitude higher than that of KDP.4. Calcone delivatives shows very strong SHG. The activity is 8 times begger than that of LINb <O_3> which is highest among inorganic materials.