… It is shown that the use of this technique may be of limited value in the case of semiconductor
materials. For the ac field technique we examine the sensitivity of enhancement to the …

… From these figures it is clear that the enhancement in the gain coefficint is more in the … The
theory developed in this paper could be applicable to the other photorefractive materials. From …

… of both techniques.By employing Schildkraut’s model for the space-charge field formation in
organic PR materials,21,… This counteracts the effect of the enhanced poling properties of the …

… space–charge field effects in photorefractive materials are … enhancement techniques.
Hereafter, we introduce the basic concepts underlying the nonlinear parametric space–charge field …

… In 1981–82, the so-called DC enhancement of holograms (of space-charge field) during
two-… for the space-charge field with the use of the DC and AC enhancement techniques, see …

… an enhancement of the component of the space-charge field … photorefractive material to an
applied alternating electric field… mixing enhancement technique. In Section 2 we present the …

… We then use a semiempirical technique to solve the … , and therefore, seems not to be
applicable for most of our materials. … affect the speed of spacecharge field formation, we modeled …

… activities at the Symposium on Photorefractive Materials taking … that the field of photorefractive
materials is advancing … of the microscopic properties of the materials - based on increased …

… of the material, it generates a photoinduced space charge field … In other words, photorefractive
materials are very well suited … It was early proposed that two techniques could be used to …

… Three methods for the buildup of space-charge waves are … system of equations for the
space-charge field E, the density of … Consequently, a fundamental grating maximally enhanced …