title: Pattern formation using optical vortices in a photorefractive single feedback system.
abstract: We analyze numerically the dynamics of optical patterns in a photorefractive single feedback system where a vortex beam is used as the input beam. Depending on the topological charge of the vortex and on the nonlinear photorefractive coupling strength, we observe different pattern geometries with a rotating dynamics.
authors.affiliation: Supélec, Optics and Electronics (OPTEL) Research Group, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS)-EA4423, 2 rue Edouard Belin, 57070 Metz, France. vianney.caullet@supelec.fr
authors.forename: Vianney
authors.initials: V
authors.lastname: Caullet
authors.forename: Nicolas
authors.initials: N
authors.lastname: Marsal
authors.forename: Delphine
authors.initials: D
authors.lastname: Wolfersberger
authors.forename: Marc
authors.initials: M
authors.lastname: Sciamanna