Effect of the Atomic Ratio of Ba to Ti on Optical Properties of Gold‐Dispersed BaTiO ₃ Thin Films

Abstract

Gold‐dispersed BaTiO, thin films were prepared by the rf magnetron sputtering method. The atomic ratio of Ba to Ti in the films was varied and the effects on the linear and nonlinear optical properties were investigated. As the atomic ratio increased, the value of χ (3) /α 532 for the gold‐dispersed BaTiO 3 thin films slightly increased. It was found that the increase in the value of χ (3) /α 532 is due mainly to a change in the crystalline state of the BaTiO 3 matrix. However, it was also found that the atomic ratio had a smaller effect on the value of χ (3) /α 532 than did the refractive index of the matrix.