Abstract
Bi12TiO2Ø (BTO) is an isomorph of Bi12SiO2Ø (BSO) and Bi12GeO2Ø (BGO). Each material is cubic (point group 23) and exhibits interesting photorefractive properties. BTO, although much less extensively investigated, has several specific advantages, namely its lower optical activity by a factor of 3.5 compared to BSO and BGO [1], its larger electro-optic coefficient [2,3], and its higher sensitivity at 633 nm [4]. In recent years, Petrov and coworkers [4] have demonstrated very high values of beam coupling gain and diffraction efficiency at 633 nm in BTO using anisotropic scattering and the ac-field effect.
© 1987 Optical Society of America
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