GOLD NANOPARTICLES ION-IMPLANTED IN GLASS WITH ENHANCED NONLINEAR-OPTICAL PROPERTIES

Silica glass with dispersed colloid Au particles was synthesized by io n implantation. Colloid Au particles were found to grow through an Ost wald ripening mechanism controlled by diffusion in the silica glass. T he third-order nonlinear optical susceptibility chi(3) of this glass w as found to be proportional to the fourth power of the radius of the c olloid particles or the fourth power of the absorption coefficient at the peak of a plasmon band when the total volume of the colloid partic les was constant. Furthermore, chi(3) of the glass was inversely propo rtional to the third power of the total volume of colloid particles wh en the absorption coefficient of the plasmon band was constant.