In an extension of earlier work by Moharam et al.[J. Appl. Phys. 50, 5642 (1979)], we use a
perturbation scheme to obtain a higher-order expression for the steady-state photorefractive …

The analytic expressions for the first three higher-order harmonics of the space-charge field
versus time are obtained by use of the hopping model of Feinberg [J. Appl. Phys. 51, 1297 …

Photorefractive materials have been assuming ever increasing prominence in the non-linear
optics field due to their unique capability for displaying strong non-linear effects at milliwatt …

The response of photorefractive materials to sinusoidal intensity patterns of high modulation
depths is considered. It is shown that the induced refractive-index response in this regime is …

Even though the Kukhtarev model [SOy. Tech. Phys. Lett. 2, 438 (1976); SOy. Phys. Solid
State 16, 2414 (1975); Ferroelectrics 22, 949 (1979); SOY. J. Quantum Electron. 8, 231 …

Depending on their characteristics (energy, concentration,...) localized imperfection levels,
directly or indirectly, determine the properties of photorefractive materials. The aim of this …

The main results of the theory of spatial subharmonics in photorefractive crystals are
summarized. The theory shows that Kukhtarev's equations for the photorefractive response …

We consider the process of nonstationary enhancement of the photorefractive effect through
the application of time-varying (square-wave) electric fields. By examining the full second …

A microscopic model of the non-steady-state photoelectromotive force excited by a vibrating
interference pattern in a bipolar photoconductor under an external dc electric field is …

This chapter provides a detailed review of theoretical work on the photorefractive effect. The
physical model of photorefractivity used here, which now seems well established by many …