Laser-induced picosecond transient gratings are used to study carrier transport via free
carrier and photorefractive nonlinearities. The feedback effect of a light-induced space …

The application of an external dc field enhances greatly the two-wave mixing gain in
photorefractive InP: Fe but the heating of the crystal prevents stable operation at high fields …

Theoretical and experimental results are presented for simultaneous multibeam coupling in
photorefractive SBN: Ce. Within a single crystal, multiple signals are amplified through a …

It is shown experimentally that the nonsymmetric behavior of the beam-coupling gain
coefficient of BaTiO_3 crystals with respect to the sense of the c axis is caused by an …

Beam-coupling experiments are carried out with two BaTiO_3 crystals as a function of the
intensity and wavelength. We demonstrate in these experiments that hole–electron …

Two coherent light beams can couple in any absorbing material owing to a light-induced
modulation of the material's dielectric constant. In photorefractive crystals the coupling …

We present data showing a nonlinear photorefractive response at high modulation depths in
a Bi_12TiO_20 sample when applied ac fields are used. The data are interpreted by means …

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 …

We have measured photoreflectance (PR) at 77 K in the vicinity of the E 1 optical feature
from Hg 1-x Cd x Te (0.14< x< 0.3) using infrared (3.39 μm) and deep blue-violet (4579 and …

We characterize Rh: BaTiO3 by cw two-beam coupling experiments at 1.06 μm. We
demonstrate that all our measurements are well described by a single-carrier, single-site …