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Large third-order nonlinear optical properties of C70 fullerene in the infrared regime
Authors:Shao-Chen Yang  Qihuang Gong  Zongju Xia  Y H Zou  Y Q Wu  D Qiang  Y L Sun  Z N Gu
Institution:(1) Department of Physics, Peking University, 100871 Beijing, P.R. China;(2) Department of Chemistry, Peking University, 100871 Beijing, P.R. China
Abstract:The nonlinear third-order optical susceptibility of C70 in a toluene solution is measured for the first time by the method of degenerate four-wave mixing using 10 ns laser pulses at 1.06 mgrm. The third-order susceptibility X in (3) is 5.6×10–12 esu for a C70 toluene solution at a concentration of 0.476 g/l. The correspondent magnitude of the hyperpolarizability gamma1111 of the C70 molecule is 1.2×10–30 esu which is in a good agreement with the prediction given by the model of a free electron in a spherical box.
Keywords:42  65  Hw  36  90  +f  42  65  Ma
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