芪盐与二十酸混合制得的LB膜二阶光学非线性的研究

STUDY ON SECOND-ORDERNON-LINEAR OPTECAL IN MIXED STILBAZIUM SALT AND TWENTY-ACID LANGMUIR-BLODGETT MONOLAYER

把芪盐与二十酸混合，制备单层ＬＢ膜，测量ＬＢ膜的二次谐波，得到了比纯芪盐ＬＢ膜更大的二次谐波信号。二次谐波信号随ＬＢ膜上芪盐含量的增加而增加，在芪盐含量为０．５－０．７范围二次谐波信号达到最大值，之后，随芪盐在ＬＢ膜上含量的增加而降低。作者认为，芪盐与二十酸混合制得的ＬＢ膜，二次谐波增强是由于量子尺寸效应对光学非线性的贡献，并认为芪盐与二十酸有一最佳混合比，约在芪盐含量为０．５－０．７处，量子尺寸效应对二次谐波的贡献最大。

Langmuir-Blodgett monolayer is made in the mixed stilbazium salt andtwenty-acid.Measure the second-harmonic generation of Langmuir-Blodgett film,Sec-ond-harmonic generation signal is larger than that of pure stilbazium salt Langmuir-Blodgett film. The second-harmonic generation signal increase. When the stilbazium saltcontent on Langmuir-Blodgett film increase.when content is about 0.5-0.7,the signal is thelargest.After that,the signal reduce when the content increase. The increase of thesecond-harmonic generation signal in mixed stilbazium salt and twenty-acidLangmuir-Blodgett film is that the contribution of quantum size effect on the opticalnonlinear.When stilbazium salt content is about 0.5-0.7,the optical nonlinear contributionof quantum size effect is maximum.