中国激光, 2001, 28 (5): 443, 网络出版: 2006-08-10
半花菁LB多层膜二次谐波产生的温度特性研究
Investigation on Temperature Properties of Second-harmonic Generation in Hemicyanine Langmuir-Blodgett Multilayer Films
Langmuir-Blodgett多层膜 聚集体 二次谐波产生文献标识码:A Langmuir-Blodgett multilayer films aggregates second harmonicgeneration
摘要
利用吸收谱和二次谐波产生(SHG)技术研究了温度对半花菁Langmuir-Blodgett(LB)多层膜的膜结构和非线性光学特性的影响。LB膜的二次谐波强度起初随温度的增加而增加，最大值约在45℃左右，然后随温度的增加而减小。在半花菁与花生酸或花生酸铬交替的LB多层膜中，由于花生酸的融化，导致膜结构的变化，使得二次谐波强度随温度的变化有一个突变点。线性吸收谱表明半花菁分子在LB多层膜中形成了H-聚集体，并且通过加热可以使聚集体分解。
Abstract
Molecular structure andoptical nonlinearity in interleaving hemicyanine/arachidic acid or cadmium arachidatemultilayers, and Z-type pure hemicyanine multilayers were investigated as a function ofthe temperature by means of second harmonic generation (SHG) and linear absorption. TheSHG intensity shows a maximum at about 45℃ in the multilayers. An inflection was observed in the temperaturedependence of SHG intensity in the interleaving hemicyanine/arachidic acid andhemicyanine/cadmium arachidate multilayers, and was attributed to melting of arachidicacid or cadmium arachidate. The absorption spectra show that the molecules in themultilayers formed H-aggregates which could be dissociated by heating.
王文军, 陆兴泽, 徐建华, 姜永强, 刘秀, 王恭明, 王文澄, 李富铭. 半花菁LB多层膜二次谐波产生的温度特性研究[J]. 中国激光, 2001, 28(5): 443. 王文军, 陆兴泽, 徐建华, 姜永强, 刘秀, 王恭明, 王文澄, 李富铭. Investigation on Temperature Properties of Second-harmonic Generation in Hemicyanine Langmuir-Blodgett Multilayer Films[J]. Chinese Journal of Lasers, 2001, 28(5): 443.
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