Au⁺-Ion-Implanted Silica Glass with Non-Linear Optical Property

Au + ions have been implanted in silica glass at an acceleration energy of 1.5 MeV and a fluence level of 10 17 ions/cm 2 . The Au ions form colloid particles with the radius of 2.9 nm after heat treatment. The glass with Au colloid particles shows the large third order non-linear susceptibility; χ (3) =1.2×10 -7 esu. The large χ (3) value of the glass is attributed to the high concentration of Au colloid particles in the narrow region.