Abstract
A dmit2- 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.
Highlights
Nonlinear optical materials have attracted much interest because of their potential in fabricating ultrafast optical switching and processing devices [1,2,3]
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, (3), of the sample solution was obtained to be about 2.98 10-14 esu at the concentration of 1.57 10-3 M
Summary
Nonlinear optical materials have attracted much interest because of their potential in fabricating ultrafast optical switching and processing devices [1,2,3]. Using CS2 OKE signal as reference signal measured under identical conditions, the third-order optical nonlinear susceptibility, (3), of the sample solution was obtained to be about 2.98 10-14 esu at the concentration of 1.57 10-3 M. Among them, -conjugated organic material has been paid great attention for its high nonlinear optical (NLO) properties and ultrafast response [4].
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