title: Observation of light localization in modulated Bessel optical lattices.
abstract: We generate higher-order azimuthally modulated Bessel optical lattices in photorefractive crystals by employing a phase-imprinting technique. We report on the experimental observation of self-trapping and nonlinear localization of light in such segmented lattices in the form of ring-shaped and single-site states. The experimental results agree well with numerical simulations accounting for an anisotropic and spatially nonlocal nonlinear response of photorefractive crystals.
authors.forename: Robert
authors.initials: R
authors.lastname: Fischer
authors.forename: Dragomir N
authors.initials: DN
authors.lastname: Neshev
authors.forename: Servando
authors.initials: S
authors.lastname: Lopez-Aguayo
authors.forename: Anton S
authors.initials: AS
authors.lastname: Desyatnikov
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Sukhorukov
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar