Study on the Third-order Nonlinear Optical Properties of bis(tetraethylammonium) bis(1,3-dithiole-2-thione-4,5-dithiolato)cadium
2013
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.
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