title: Light filaments without self-channeling.
abstract: The propagation of intense 200 fs pulses in water reveals light filaments not sustained by static balance between Kerr-induced self-focusing and plasma-induced defocusing. Numerical calculations outline the occurrence of a possible scenario where filaments appear because of spontaneous reshaping of the Gaussian input beam into a conical wave, driven by the requirement of maximum localization, maximum stationarity, and minimum nonlinear losses.
authors.affiliation: Department of Quantum Electronics, Vilnius University, Sauletekio 9, LT-2040 Vilnius, Lithuania.
authors.forename: Audrius
authors.initials: A
authors.lastname: Dubietis
authors.forename: Eugenijus
authors.initials: E
authors.lastname: Gaizauskas
authors.forename: Gintaras
authors.initials: G
authors.lastname: Tamosauskas
authors.forename: Paolo
authors.initials: P
authors.lastname: Di Trapani