title: Modification of solitary waves by third-harmonic generation.
abstract: The effect of phase-matched third-harmonic generation on the structure and stability of spatial solitary waves is investigated. A power threshold for the existence of two-frequency spatial solitons is found, and the multistability of solitary waves in a Kerr medium owing to a higher-order nonlinear phase shift caused by cascaded third-order processes is revealed.
authors.forename: R A
authors.initials: RA
authors.lastname: Sammut
authors.forename: A V
authors.initials: AV
authors.lastname: Buryak
authors.forename: Y S
authors.initials: YS
authors.lastname: Kivshar