液體材料之分子結構與其非線性光學特性之研究

Abstract

本論文包含三倍頻實驗與EFISH實驗兩部分.在三倍頻實驗中,我們觀測了 甲醇/水 與acetonitrile/水 兩氫鍵混合液體系,並在acetonitrile/水混 合液體系中觀測到微觀相分離的現象.在EFISH的實驗中我們檢測比較了一 系列的分子,並對其中的差異提出解釋.分子間的作用對二階及三階光學過 程的影響亦在此做一比較. Two major parts,THG technique and EFISH test,are reported.THG technique is applied to two hydrogen - bond liquid binary mixtures of methonal/water and acetonitrile/water .Microscopic phase separation is observed in acetonitrile/water binary mixtures.A serier of samples are tested,compared and investigated in the EFISH test.We also compare the effects of interaction between molecules on the second and third order light - matter interaction process.