Absorption, light-induced absorption changes, photo and dark conductivities, bulk
photovoltaic currents and two-beam coupling gain coefficients are measured for oxidized, as …

are annealed in a hydrogen atmosphere at various temperatures. After these reducing
treatments, absorption, light-induced absorption changes, two-beam coupling direction …

Photorefractive barium-calcium titanate crystals with the congruently melting composition
(Ba 0.77 Ca 0.23 TiO 3) doped with iron are annealed in a hydrogen atmosphere at various …

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 …

Variably valent iron impurities have been suggested as the source of photorefractive charge
carriers in BaTiO_3. High-purity BaTiO_3 crystals were grown with transition-metal impurity …

Nominally pure and iron doped, as-grown, and thermally annealed photorefractive barium–
calcium–titanate crystals of the congruently melting composition Ba 0.23 Ca 0.77 TiO 3 …

Nominally pure and rhodium-doped barium-calcium-titanate crystals of the congruently
melting composition Ba 0.77 Ca 0.23 TiO 3 (BCT) are grown by the Czochralski technique …

We show that shallow acceptors reduce the lifetime of free holes and make the
photoconducti-vity of barium titanate increase sublinearly with intensity both in the cw and …

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 …

Photorefractive materials are used for holographic storage, image processing, and phase
conjugation 11, 2/. Especially BaTi03 with its large electrooptic coefficients has been …