title: Self-focusing and self-trapping in unbiased centrosymmetric photorefractive media.
abstract: We predict self-focusing and self-trapping of optical beams propagating in unbiased centrosymmetric photorefractive crystals in the near-transition paraelectric phase, where the nonlinear response is proportional to the square of the diffusion space-charge field.
authors: B
authors: B
authors: Crosignani
authors: E
authors: E
authors: Delre
authors: P
authors: P
authors: Di Porto
authors: A
authors: A
authors: Degasperis