1992 Volume 100 Issue 1160 Pages 599-601
Au microcrystals embedded in glass have a high potential use as nonlinear optical materials. In order to increase the content of Au in glass, sol-gel method was applied. Using tetraethoxysilane and sodium tetrachloroaurate as starting materials, Au-doped silica glass films were deposited on silica substrates by dip-coating method. Average radius of Au microcrystals in the glass films is 40Å. Heat treatment of this film at 900° or 1000°C shifted the absorption peak around 530nm to the shorter wavelength and changed the bandwidth of this peak broader, which indicates the decrease in crystal radius.
