Study on third-order nonlinear optical properties of(C_4H_9)_4NAu(dmit)_2 using Z-scan technique

摘要

A dmit~(2-) salt: [(C_4H_9)_4N]Au(dmit)_2 was synthesized. Its third-order nonlinear optical properties of its acetone solution were investigated by Z-scan technique using a pulsed laser with 28 ps duration and 10 Hz repetition at 532 nm. The third-order nonlinear refractive index n_2 and nonlinear absorption coefficient β of the sample solution were obtained to be about 4.997x10~(-12) esu and 1.818 cm/GW at the concentration of 2x10-3 M. The second-order hyperpolarizability for its molecular was estimated to be as large as 2.74x10~(-31) esu, suggesting [(C_4H_9)_4N]Au(dmit)_2is a promising material for all-optical switching.