含卟啉衍生物的超薄膜的三阶非线性光学性质

Third-order nonlinear optical properties of an ultrathin film containing a porphyrin derivative.

作者信息

Jiang Li, Lu Fushen, Li Hongmei, Chang Qing, Li Yuliang, Liu Huibiao, Wang Shu, Song Yinglin, Cui Guanglei, Wang Ning, He Xiaorong, Zhu Daoben

机构信息

CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China.

出版信息

J Phys Chem B. 2005 Apr 7;109(13):6311-5. doi: 10.1021/jp045024x.

DOI:10.1021/jp045024x

PMID:16851702

Abstract

An ultrathin nanoscopic multilayer film has been fabricated through the electrostatic layer-by-layer self-assembly of negatively charged 5,10,15,20-tetrakis(3,4,5-trihydroxyphenyl)porphyrin (DHP) and oppositely charged polyethylenimine (PEI). UV-vis spectra showed a continuous and uniform deposition process of PEI and DHP. The film structure was characterized by small-angle X-ray diffraction measurement and AFM images. The nonlinear optical properties of ultrathin film were studied by Z-scan technique with laser duration of 8 ns at a wavelength of 532 nm. The film sample exhibited strong nonlinear saturated absorption and a self-defocusing effect. The nonlinear absorption coefficient and refractive index of the self-assembly ultrathin film are -9.7 x 10(-5) m/W and -7.56 x 10(-12) m(2)/W, respectively.

摘要

通过带负电荷的5,10,15,20-四（3,4,5-三羟基苯基）卟啉（DHP）与带相反电荷的聚乙烯亚胺（PEI）的静电逐层自组装制备了一种超薄纳米多层膜。紫外-可见光谱显示了PEI和DHP连续且均匀的沉积过程。通过小角X射线衍射测量和原子力显微镜图像对薄膜结构进行了表征。利用Z扫描技术在波长532nm、激光脉宽8ns的条件下研究了该超薄膜的非线性光学性质。薄膜样品表现出强烈的非线性饱和吸收和自散焦效应。自组装超薄膜的非线性吸收系数和折射率分别为-9.7×10^(-5) m/W和-7.56×10^(-12) m^(2)/W。