An amplification mechanism relying mainly on the real part of the arising space charge field
in the presence of two strong pump beams is described. The dependence of amplification on …

A finite difference method is used to analyze the behavior of photorefractive InP: Fe at high
fringe contrast under externally apphed field. The evolution with increasing fringe contrast m …

We present for the first time, to our knowledge, a theoretical analysis of the nonlinear
dynamic space-charge field buildup when a photorefractive medium is exposed …

The space-charge-field amplitude inside photorefractive crystals was evaluated using three
different experimental techniques:(i) two-wave mixing gain measurements,(ii) direct phase …

The Photorefractive Effect in Semiconductors 239 of the materials [8.9]. The materials figures
of merit relevant for maximum index change (n3rij) and for maximum sensitivity (n~ r~ j/ej) …

The simplified band transport model of the photorefractive effect in which the material
responds linearly to local changes in light intensity modulation ratio (fringe contrast) is …

The photorefractive effect in semiconductors leads to nonlinear interactions between optical
waves such as four-wave mixing; however, the required intensity levels are orders of …

The photorefractive effect consists of three roughly separate physical processes:
photoexcitation of charge carriers; electronic transport and trapping; and an electrooptic …

We show that a photoconductive crystal, placed in a rapidly alternating ac field and exposed
to nonuniform light, exhibits singularities of the induced space charge and discontinuities of …

At wavelengths close to the band edge, strong photorefractive gratings using the Franz–
Keldysh electrorefractive effect can be written in semiconductors. Two‐beam‐coupling …