Anisotropy, nonlocality, and space-charge field displacement in (2 + 1)-dimensional self-trapping in biased photorefractive crystals.
The complete basic equations for (2+1) -dimensional self-trapped beam propagation in photorefractive media are numerically solved, with the anisotropic nonlocal response, diffusion, and space-charge-field displacement effects taken into account. Initial Gaussian beams show elliptical beam shapes, self-deflection, and long-lived oscillations after propagation. The critical parameters that determine the possible damping of the transients are discussed.
Gatz
S
S
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektoskopie, Rudower Chaussee 6, D-12489 Berlin, Germany.
Herrmann
J
J