Photorefractive materials combine photoconductive and electro-optic properties: light affects
their electrical conductivity; their optical properties (refractive index, etc.) are affected by …

A new and simple method for the determination of the trap density in C60-sensitized
photorefractive polymers is presented. We show that the radical anion of C60 acts as the …

Strontium barium niobate (SBN) was doped with rhodium to enhance its photorefractive
behavior. Crystals with six different Rh concentrations, ranging from 0.015 to 0.20 wt …

We describe volume holograms written in photorefractive crystals in which the writing beams
experience two-beam coupling. We obtain analytic expressions for the diffraction efficiency …

We find strong optical nonlinearities in SrxBa_1− xNb_2O_6 (x= 0.61 and x= 0.75) and in
BaTiO_3 crystals caused by thermally induced changes of the refractive indices. This gives …

A series of cobalt-doped barium titanate (BaTiO_3) crystals were grown; these crystals have
the highest beam-coupling gain reported to date, 7.9 cm^− 1, measured by using the …

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 a method to separate the effects of trap gratings and electro-optic gratings in
BaTiO_3 crystals, and we determine the true spatial shift between the electro-optic grating …

Because of the light-induced bleaching of GaAs at λ= 1.064 µm, the amplitude gratings
strongly affect the photorefractive recording in this material. We extract two contributions that …

We describe how optical beams from a mode-locked laser will couple in a photorefractive
crystal. We show that the two-beam-coupling gain coefficient is proportional to the square of …