title: Lateral and focal shifts of phase-conjugated beams in photorefractive materials.
abstract: It is predicted that when a dc electric field is present or when a probe beam contains temporal frequencies different from that of the pump waves a beam reflected from a photorefractive phase-conjugate mirror will experience lateral and focal shifts. These shifts are a consequence of angular dependence of the phase of the reflectivity and are similar to the Goos-Hänchen effect. The phenomenon becomes more pronounced near resonance.
authors.forename: G C
authors.initials: GC
authors.lastname: Papen
authors.forename: B E
authors.initials: BE
authors.lastname: Saleh