title: Bright spatial solitons in defocusing Kerr media supported by cascaded nonlinearities.
abstract: We show that resonant wave mixing that is due to quadratic nonlinearity can support stable bright spatial solitons, even in the most counterintuitive case of a bulk medium with defocusing Kerr nonlinearity. We analyze the structure and stability of such self-guided beams and demonstrate that they can be generated from a Gaussian input beam, provided that its power is above a certain threshold.
authors.affiliation: Australian Photonics Cooperative Research Centre, Research School of Physical Sciences and Engineering, Optical Sciences Centre, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: O
authors.initials: O
authors.lastname: Bang
authors.forename: Y S
authors.initials: YS
authors.lastname: Kivshar
authors.forename: A V
authors.initials: AV
authors.lastname: Buryak