Abstract

Since the early development of photorefractive materials, a great deal of attention has been directed toward optimizing the properties of photorefractive oxide crystals. In general, the approach has been to alter the populations of participating species by intentional doping during crystal growth [1,2] and/or by post-growth heat treatment under various partial pressures of oxygen [1,3]. Recent experiments performed with BaTiO₃ [4,5] have produced somewhat differing results. There has been little theoretical understanding of the effects of doping and oxidation/reduction treatments on the defect structure and hence the photorefractive properties of such crystals.

© 1987 Optical Society of America