Photorefractive Properties of Doped BaTiO3 and SBN

摘要

Several novel photorefractive scattering processes were studied. Isotropicscattering of a single intense pump beam was observed and modeled. Numerical calculations, performed using material parameters consistent with the previous experiments, yielded scattering cross sections in excellent agreement with the observations. Anisotropic scattering of a single extraordinary polarized beam into conical rings of light was also observed. Using a phase matching condition and the electrooptic tensor symmetry properties of BaTiO3, the scattering process of the inner ring was uniquely determined. A model which describes the formation of the outer ring was also proposed. Photorefractive effect, Barium titanate, Stronium barium niobate, Iron doping, Anisotropic diffraction.