Investigation of third-order nonlinear optical properties of two azo-nickel chelate compounds  

作　　者：向红 田志远 王树峰 王振伟 李智 杨宏 姚建年 龚旗煌 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Department of Physics,Peking University [2]Key Laboratory of Photochemistry,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2008年第7期2535-2538,共4页中国物理B（英文版）

基　　金：supported by the National Key Basic Research Special Foundation (NKBRSF) of China (Grant No TG1999075207);the National Natural Science Foundation of China (Grant Nos 10434020,10521002,60378012,90206003,10328407 and 90101027)

摘　　要：This paper investigates the third-order nonlinear optical properties of two azo-nickel chelate compounds by the optical Kerr gate method at 830 nm wavelength with pulse duration of 120 fs. Both of the two compounds exhibited large third-order optical nonlinearity. The second-order hyperpolarizability,γ, of Compound 1 is of 1.0 × 10^-31 esu. Due to the charge transfer, the γ of Compound 2 with electron donor and acceptor group is 4.9 × 10^-31 esu, which is a four-time enhancement in comparison with Compound i. The absorption spectra show that the electron push-pull effect, which induces intramolecular charge transfer, leads to the increased optical nonlinearity.This paper investigates the third-order nonlinear optical properties of two azo-nickel chelate compounds by the optical Kerr gate method at 830 nm wavelength with pulse duration of 120 fs. Both of the two compounds exhibited large third-order optical nonlinearity. The second-order hyperpolarizability,γ, of Compound 1 is of 1.0 × 10^-31 esu. Due to the charge transfer, the γ of Compound 2 with electron donor and acceptor group is 4.9 × 10^-31 esu, which is a four-time enhancement in comparison with Compound i. The absorption spectra show that the electron push-pull effect, which induces intramolecular charge transfer, leads to the increased optical nonlinearity.

关 键 词：nonlinear optics ULTRAFAST azo chelate 

分 类 号：O437[机械工程—光学工程]