Hongliang Yang et al 2005 J. Opt. A: Pure Appl. Opt. 7 510 doi:10.1088/1464-4258/7/9/010
Hongliang Yang1, Xinqiang Wang2, Quan Ren1, Guanghui Zhang2, Xiangbing Sun1, Lin Feng1, Shufeng Wang3 and Zhenwei Wang3
Show affiliationsA dmit2− salt: bis(tetraethylammonium)bis(1,3-dithiole-2-thione-4,5-dithiolato) mercury (EMDT) was synthesized. The optical Kerr effect (OKE) signal of its acetone solution was measured by the femtosecond optical Kerr gate technique. Using the CS2 OKE signal as a reference signal measured under identical conditions, the third-order optical nonlinear susceptibility, χ(3), of the sample solution was obtained as about 6.193 × 10−14 esu at the concentration of 1.39 × 10−4 M. The second hyperpolarizability for molecular EMDT was estimated to be as large as 2.73 × 10−31 esu. Its response time was about 184 fs, which is believed to be the contribution from the delocalized electrons.
42.70.Nq Other nonlinear optical materials; photorefractive and semiconductor materials
42.65.Hw Phase conjugation; photorefractive and Kerr effects
42.70.Jk Polymers and organics
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
Issue 9 (September 2005)
Received 7 April 2005, accepted for publication 26 May 2005
Published 9 August 2005
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