Ara es mostren els items 70-89 de 89

  • Spatial soliton switching in quasi-continuous optical arrays 

    Kartashov, Yaroslav V.; Zelenina, A S; Torner Sabata, Lluís; Vysloukh, Victor A. (2004-03)
    Article
    Accés restringit per política de l'editorial
    We report on the phenomenon of trapping and switching of one-dimensional spatial solitons in Kerr-type nonlinear media with transverse periodic modulation of the refractive index. The solitons slowly radiate upon propagation ...
  • Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2007-07)
    Article
    Accés restringit per política de l'editorial
    We analyze the salient features of vortex-ring solitons supported by cylindrically symmetric media with nonlocal thermal nonlinearity. We discover the existence of a maximum allowed topological charge for such vortex ...
  • Stabilization of one-dimensional periodic waves by saturation of the nonlinear response 

    Kartashov, Yaroslav V.; Egorov, A A; Zelenina, A S; Vysloukh, Victor A.; Torner Sabata, Lluís (2003-12)
    Article
    Accés restringit per política de l'editorial
    We address the properties of (1+1)-dimensional periodic waves in conservative saturable cubic nonlinear media and discover that cnoidal- and snoidal-type waves are completely stable within a broad range of parameters. The ...
  • Stabilization of vector solitons in optical lattices 

    Kartashov, Yaroslav V.; Zelenina, A S; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-12)
    Article
    Accés restringit per política de l'editorial
    We address the properties and dynamical stability of one-dimensional vector lattice solitons in a Kerr-type cubic medium with harmonic transverse modulation of the refractive index. We discovered that unstable families of ...
  • Stable multicolor periodic-wave arrays 

    Kartashov, Yaroslav V.; Egorov, A A; Zelenina, A S; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-01)
    Article
    Accés restringit per política de l'editorial
    We study the existence and stability of periodic-wave arrays propagating in uniform quadratic nonlinear media and discover that they become completely stable above a threshold light intensity. To the best of our knowledge, ...
  • Stable radially symmetric and azimuthally modulated vortex solitons supported by localized gain 

    Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-01)
    Article
    Accés restringit per política de l'editorial
    We discover that a spatially localized gain supports stable vortex solitons in media with cubic nonlinearity and two-photon absorption. The interplay between nonlinear losses and gain in amplifying rings results in the ...
  • 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 ...
  • 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 ...
  • 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 ...