title: Self-focusing dynamics of polarization vortices in Kerr media.
abstract: We investigate numerically and experimentally the spatial collapse dynamics and polarization stability of radially and azimuthally polarized vortex beams in pure Kerr medium. These beams are unstable to azimuthal modulation instabilities and break up into distinct collapsing filaments. The polarization of the filaments is primarily linear with weak circular components at the filaments' boundaries. This unique hybrid linear-circular polarization collapse pattern persists to advanced stages of collapse and appears to be a general feature of beams with spatially variant linear polarization.
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA. amiel.ishaaya@cornell.edu
authors.forename: Amiel A
authors.initials: AA
authors.lastname: Ishaaya
authors.forename: Luat T
authors.initials: LT
authors.lastname: Vuong
authors.forename: Taylor D
authors.initials: TD
authors.lastname: Grow
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Gaeta