Studies of nonlinear refraction in metal cluster polymer cis-Cp~*_2Mo_2S_4Cu_2I_2·(CH_2Cl_2)_2/CH_2Cl_2 solution

Nonlinear refraction of metal cluster polymer cis-Cp*2Mo2S4Cu2I2.(CH2Cl2)2/CH2Cl2 was investigated by Z-scan technique with laser pulses of 4.5 ns pulse-width at a wavelength of 532 nm.The experiment results show that the nonlinear refraction mainly results from third-order nonlinear refraction and thermally induced refraction caused by instantaneous nonlinear absorption.