Analysis of two-wave coupling in cubic crystal classes 23 and 4¯ 3m is presented for
arbitrary orientation of the grating vector and the applied electric field. We show that the most …

We investigate diffraction from a thermally fixed grating in a photorefractive medium with an
ion concentration that is large compared with the acceptor density. A numerical solution to …

We present concrete evidence for the formation of ferroelectric domain gratings induced by
photorefractive space-charge electric fields in top-seeded solution-grown barium titanate …

Optical low coherence reflectometry is applied to measure with μm precision the type,
position and length of gratings inside a barium‐titanate crystal producing self‐pumped …

We explain the apparent sublinear intensity dependence of photoconductivity in barium
titanate. In our model shallow acceptors act as a reservoir for charges optically excited from …

Beam paths inside photorefractive crystals under conditions of beam fanning or self-pumped
conjugation that uses crystal corners are often kinky—ie, they consist of short, straight line …

We consider the diffraction properties of index gratings in photorefractive media, assuming
an arbitrary momentum mismatch (Bragg mismatch). The incident and diffracted waves …

We present two-beam coupling experiments in the nanosecond regime at 1.06?? µm, using
photorefractive BaTiO_3: Rh.? The maximum observed exponential gain coefficient is 14.2 …

Two-beam intensity coupling is calculated for photorefractive crystals with two types of
movable charge carrier in the undepleted-pump approximation. The analytical expressions …

Illumination of a photorefractive BaTiO_3 crystal provides an induced absorption increase,
which is explained by the two-center charge transport model. Detailed investigations of …