Ara es mostren els items 89-108 de 108

  • Stable ring-profile vortex solitons in Bessel optical lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2005-02)
    Article
    Accés restringit per política de l'editorial
    Stable ring-profile vortex solitons, featuring a bright shape, appear to be very rare in nature. However, here we show that they exist and can be made dynamically stable in defocusing cubic nonlinear media with an imprinted ...
  • Stable soliton complexes and azimuthal switching in modulated Bessel optical lattices 

    Kartashov, Yaroslav V.; Egorov, A A; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-12)
    Article
    Accés restringit per política de l'editorial
    We address azimuthally modulated Bessel optical lattices imprinted in focusing cubic Kerr-type nonlinear media, and reveal that such lattices support different types of stable solitons whose complexity increases with the ...
  • Stripe-like quasi-nondiffracting optical lattices 

    Kartashov, Yaroslav; López Aguayo, Servando; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-05-09)
    Article
    Accés restringit per política de l'editorial
    We introduce stripe-like quasi-nondiffracting lattices that can be generated via spatial spectrum engineering. The complexity of the spatial shapes of such lattices and the distance of their almost diffractionless propagation ...
  • Suppression and restoration of disorder-induced light localization mediated by PT-symmetry breaking 

    Kartashov, Yaroslav V.; Hang, Chao; Konotop, Vladimir V; Vysloukh, Victor A.; Huang, Guoxiang; Torner Sabata, Lluís (2016-01-12)
    Article
    Accés obert
    We uncover that the breaking point of the PT-symmetry in optical waveguide arrays has a dramatic impact on light localization induced by the off-diagonal disorder. Specifically, when the gain/loss control parameter approaches ...
  • Surface gap solitons 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2006-01)
    Article
    Accés restringit per política de l'editorial
    We put forward the existence of surface gap solitons at the interface between uniform media and an optical lattice with defocusing nonlinearity. Such new type of solitons forms when the incident and reflected waves at the ...
  • Surface lattice kink solitons 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2006-12)
    Article
    Accés restringit per política de l'editorial
    We predict theoretically that surface of an optical lattice imprinted in defocusing nonlinear media can support shock, or kink waves. Such new surface waves contain a modulationally stable pedestal and are strongly localized ...
  • Surface lattice solitons in diffusive nonlinear media 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-04)
    Article
    Accés restringit per política de l'editorial
    We address the properties of surface solitons supported by optical lattices imprinted in photorefractive media with asymmetrical diffusion nonlinearity. Such solitons exist only in finite gaps of the lattice spectrum. In ...
  • Surface solitons at interfaces of arrays with spatially modulated nonlinearity 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Szameit, Alexander; Dreisow, Felix; Heinrich, Matthias; Nolte, Stefan; Tünnermann, A; Pertsch, T; Torner Sabata, Lluís (2008-05)
    Article
    Accés restringit per política de l'editorial
    We address the properties of two-dimensional surface solitons supported by the interface of a waveguide array whose nonlinearity is periodically modulated. When the nonlinearity strength reaches its minima at the points ...
  • Surface vortex solitons 

    Kartashov, Yaroslav V.; Egorov, A A; Vysloukh, Victor A.; Torner Sabata, Lluís (2006-05)
    Article
    Accés restringit per política de l'editorial
    We predict the existence of vortex solitons supported by the surface between two optical lattices imprinted in Kerr-type nonlinear media. We find that such surface vortex solitons can exhibit strongly noncanonical profiles, ...
  • Surface waves in defocusing thermal media 

    Kartashov, Yaroslav V.; Ye, F; Vysloukh, Victor A.; Torner Sabata, Lluís (2007-08)
    Article
    Accés restringit per política de l'editorial
    We predict that the interface of materials with defocusing thermal nonlinearities supports stable fundamental and higher-order surface waves when the opposite edges of the medium are maintained at different temperatures. ...
  • Topological dragging of solitons 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2005-12)
    Article
    Accés restringit per política de l'editorial
    We put forward properties of solitons supported by optical lattices featuring topological dislocations and show that solitons experience attractive and repulsive forces around the dislocations. Suitable arrangements of ...
  • Topological light bullets supported by spatiotemporal gain 

    Lobanov, Valery E.; Borovkova, Olga V.; Kartashov, Yaroslav; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-02-02)
    Article
    Accés restringit per política de l'editorial
    We reveal that the competition among diffraction, cubic nonlinearity, two-photon absorption, and gain localized in both space and time results in arrest of collapse, suppression of azimuthal modulation instabilities for ...
  • Tunable soliton self-bending in optical lattices with nonlocal nonlinearity 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-10)
    Article
    Accés restringit per política de l'editorial
    We address the phenomenon of soliton self-bending in Kerr-type nonlocal nonlinear media with an imprinted transverse periodic modulation of the linear refractive index. We show that the imprinted optical lattice makes ...
  • Two-dimensional cnoidal waves in Kerr--type saturable nonlinear media 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2003-07)
    Article
    Accés restringit per política de l'editorial
    We report theoretically the existence, classification, and basic properties of families of stationary two-dimensional cnoidal-type waves in bulk Kerr-type saturable nonlinear media. The families of two-dimensional cnoidal-type ...
  • Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices 

    Heinrich, Matthias; Kartashov, Yaroslav; Ramírez, L. P. R.; Szameit, Alexander; Dreisow, Felix; Keil, R; Nolte, Stefan; Tünnermann, Andreas; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-12)
    Article
    Accés restringit per política de l'editorial
    We report on the experimental observation of two-dimensional surface solitons residing at the interface between a homogeneous square lattice and a superlattice that consists of alternating “deep” and “shallow” waveguides. ...
  • Two-dimensional solitons in nonlinear lattices 

    Kartashov, Yaroslav V.; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-03)
    Article
    Accés restringit per política de l'editorial
    We address the existence and stability of two-dimensional solitons in optical or matter-wave media, which are supported by purely nonlinear lattices in the form of a periodic array of cylinders with self-focusing nonlinearity, ...
  • Vortex lattice solitons supported by localized gain 

    Kartashov, Yaroslav V.; Konotop, Vladimir V; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-10-01)
    Article
    Accés restringit per política de l'editorial
    We show that localized gain supports the existence of dissipative vortex solitons in periodic Kerr media with strong two-photon absorption. Vortex solitons exist in both focusing and defocusing media, with their propagation ...
  • Vortex twins and anti-twins supported by multiring gain landscapes 

    Borovkova, Olga V.; Kartashov, Yaroslav V.; Lobanov, Valery E.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-10-01)
    Article
    Accés restringit per política de l'editorial
    We address the properties of multivortex soliton complexes supported by multiring gain landscapes in focusing Kerr nonlinear media with strong two-photon absorption. Stable complexes incorporating two, three, or four ...
  • Walking-vector-soliton caging and releasing 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-06)
    Article
    Accés restringit per política de l'editorial
    We address the formation and propagation of vector solitons in optical lattices in the presence of anisotropy-induced walk-off between ordinary and extraordinary polarized field components. Stable vector solitons trapped ...
  • Wave localization at the boundary of disordered photonic lattices 

    Szameit, Alexander; Kartashov, Yaroslav V.; Zeil, P.; Dreisow, Felix; Heinrich, Matthias; Keil, R.; Nolte, Stefan; Tünnermann, A.; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-04-15)
    Article
    Accés restringit per política de l'editorial
    We report on the experimental observation of reduced light-energy transport and disorder-induced localization close to a boundary of a truncated 1D disordered photonic lattice. Our observations uncover that a higher level ...