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

Abstract

Metal nanoclusters were produced by ion implantation (Cu⁺) in silica glass with dose of 2×10¹⁷ ions/cm². 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, non-linear 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 χ³ of this kind of sample was determined to be 3·2×10⁻⁷ esu at 532 nm and 1·7×10⁻⁷ esu at 1064 nm respectively.

Keywords:

• Ion implantation
• Cu nanoclusters
• Optical non-linearity
• Z scan

Acknowledgement

This work was supported by the National Natural Science Foundation of China (grant no. 10805035 and no. 11375136).