Third order non-linear optical response of Cu nanoclusters by ion implantation in silicate glass under 532 and 1064 nm laser excitations

Metal nanoclusters were produced by ion implantation (Cu+) in silica glass with dose of 2 x 10(17) ions/cm(2). Third order non-linear optical properties of the nanoclusters were measured at 1064 and 532 nm excitations using the Z scan technique. The non-linear refraction index, nonlinear absorption coefficient and the real and imaginary parts of the third order non-linear susceptibility were deduced. Results of the investigation of non-linear optical properties by the Z scan configuration are presented, and the mechanisms responsible for the non-linear response are discussed. Third order non-linear susceptibility chi(3) of this kind of sample was determined to be 3.2 x 10(27) esu at 532 nm and 1.7 x 10(27) esu at 1064 nm respectively.