Crystalline dots and lines such as Sm2Te6O 15 and β-BaB2O4 were written in Sm 2O3 containing glasses by irradiation from a continuous Nd: YAG laser operating at a wavelength of 1064 nm, and their morphologies and nonlinear optical properties were examined. It was found that the crystalline phases formed by YAG laser irradiations were the same as those in crystallised glasses obtained by heat treatment in an electric furnace. Crystalline dots with corn-like shapes were formed, and their size depended on laser power, laser irradiation time and Sm2O3 content in glass. A close relation between dot size/length(depth) and cube root of laser irradiation time t113 was found, suggesting that the growth of crystalline dots is controlled by diffusion of ions. Crystal lines of β-BaB2O 4 were written by scanning YAG laser, and it was demonstrated from second harmonic generation measurements that the lines are β-BaB 2O4 single crystals with the c-axis orientation along the laser scanning direction. The present study proposes that Nd: YAG laser irradiations of Sm2O3 containing glasses has a great potential for spatially selected crystallisation.
|Number of pages||4|
|Journal||Physics and Chemistry of Glasses|
|Publication status||Published - 2004 Apr|