摘要
利用紫外-可见及收谱和旋转光学二次谐波产生方法研究了光学活性分子半花菁和光学非活性分子花生酸交替Y型多层LB膜中活性分子由于拉膜和“基板”增强的分子取向,我们首次发现并说明了由于平面内附加的极化导致二次谐波强度随LB层数大于平方增长关系.
Substantial in-plane optical anisotropy in Y-type Langmuir-Blodgett multilayers of a hemicyanine dye interleaved with inert material arachidic acid due to dipping-induced and' substrate'-enhanced molecular orientation was demonstrated by polarized UV-visible absorption and rotation-angle second harmonic generation techniques. We gave the first direct evidence for a super-quadratic enhancement of the second harmonic intensity with increasing film thickness due to the additional in-plane polarization.
出处
《聊城大学学报(自然科学版)》
2003年第4期10-14,共5页
Journal of Liaocheng University:Natural Science Edition
基金
supported by The Doctor Scientific Research Start-up Foundation of The China University of Mining&Technology