title: Two-dimensional self-trapped nonlinear photonic lattices.
abstract: We predict theoretically and generate in a photorefractive crystal two-dimensional self-trapped periodic waves of different symmetries, including vortex lattices-patterns of phase dislocations with internal energy flows. We demonstrate that these nonlinear waves exist even with anisotropic nonlocal nonlinearity when the optically-induced periodic refractive index becomes highly anisotropic, and it depends on the orientation of the two-dimensional lattice relative to the crystallographic c-axis.
authors.forename: Anton S
authors.initials: AS
authors.lastname: Desyatnikov
authors.forename: Nina
authors.initials: N
authors.lastname: Sagemerten
authors.forename: Robert
authors.initials: R
authors.lastname: Fischer
authors.forename: Bernd
authors.initials: B
authors.lastname: Terhalle
authors.forename: Denis
authors.initials: D
authors.lastname: Träger
authors.forename: Dragomir N
authors.initials: DN
authors.lastname: Neshev
authors.forename: Alexander
authors.initials: A
authors.lastname: Dreischuh
authors.forename: Cornelia
authors.initials: C
authors.lastname: Denz
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar