2ND-HARMONIC GENERATION IN PULSED-LASER-DEPOSITED BATIO3 THIN-FILMS

Barium titanate (BaTiO3) thin films have been deposited on MgO substra tes by pulsed-laser deposition under various deposition conditions. Th e films were characterized as highly oriented polycrystalline based on X-ray diffraction analysis, atomic force microscope observation anti the angular dependence of optical second-harmonic generation (SHG). Th e second-order nonlinear optical coefficients (d-coefficients) of one- eighth those of the bulk BaTiO3 crystal were obtained from as-grown fi lms.