Study on the Third-order Nonlinear Optical Properties of bis(tetraethylammonium) bis(1,3-dithiole-2-thione-4,5-dithiolato)cadium

Hongliang Yang, Fujun Zhang, Xinqiang Wang, Guanghui Zhang

Department of Optics, Shandong University, Jinan,250100,China.
State Key Laboratory of Crystal, Shandong University, Jinan,250100,China.

DOI: 10.4236/opj.2013.32B006                

Abstract

A dmit^2- salt: bis(tetraethylammonium)bis(1,3-dithiole-2-thione-4,5-dithiolato)cadium (CADMIT) was synthesized. The Optical Kerr Effect (OKE) signal of its acetonitrile solution was measured by femtosecond optical Kerr gate technique. Using CS₂ OKE signal as reference signal measured under identical conditions, the third-order optical nonlinear susceptibility, c⁽³⁾, of the sample solution was obtained to be about 2.98 x 10^-14 esu at the concentration of 1.57 x 10^-3 M. The second-order hyperpolarizability of its molecular was estimated to be as large as 1.23 x 10^-32 esu. Its response time was about 195 fs, which is believed to be the contribution from the delocalized electrons.

Keywords

Optical Nonlinearity; Kerr Gate Technology; Response Time

Conflicts of Interest

The authors declare no conflicts of interest.

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