摘要
本文利用 Z扫描测量技术首次对半花菁 LB膜的三阶非线性光学特性进行了研究 .实验结果表明 ,LB多层膜中的半花菁分子具有较高的三阶非线性折射率 n2 =2 .0× 1 0 - 8( esu) ,这主要是半花菁分子中 π电子体系的贡献 ,并且由于 5 3 2 nm在其 Q吸收带内 ,引起三阶非线性的共振增强效应 ,实验数据与理论拟合结果符合得很好 .半花菁 LB膜的三阶非线性的响应时间在 3 0
In this paper,the third order nonlinear optical properties of hemicyanine were investigated by using Z scan technique and UV visible absorption spectrum in Langmuir Blodgett multilayers The hemicyanine molecules have a high third order nonlinear refraction n 2=2 0×10 -8 (esu) which contributed to the π electron system,and nonlinear resonant enhanced effect due to the 32nm within the Q band of hemicyanine multilayers The experimental data agreed well with the theoretical fit results The response time of the third order nonlinear optical properties of hemicyanine in Langmuir Blodgett multilayers is less than 30ns
出处
《光子学报》
EI
CAS
CSCD
北大核心
2001年第6期691-694,共4页
Acta Photonica Sinica
基金
国家自然科学重点基金 (1 983 4 0 3 0 )
教育部高校博士点基金
上海应用物理研究中心资助项目
关键词
三阶非线性
半花菁
LB多层膜
Z扫描
Third order nonlinearity
Hemicyanine
Langmuir Blodgett multilayers
Z scan
