Ara es mostren els items 34-53 de 54

  • Self-trapping and splitting of bright vector solitons under inhomogeneous defocusing nonlinearities 

    Kartashov, Yaroslav; Vysloukh, Victor A.; Torner Sabata, Lluís; Malomed, Boris A. (2011-12-01)
    Article
    Accés restringit per política de l'editorial
    We show that bimodal systems with a spatially nonuniform defocusing cubic nonlinearity, whose strength grows toward the periphery, can support stable two-component solitons. For a sufficiently strong cross-phase-modulation ...
  • Shaping solitons properties in Mathieu lattices 

    Kartashov, Yaroslav V.; Egorov, A A; Vysloukh, Victor A.; Torner Sabata, Lluís (2006-01)
    Article
    Accés restringit per política de l'editorial
    We address basic properties and stability of two-dimensional solitons in photonic lattices induced by the nondiffracting Mathieu beams. Such lattices allow for smooth topological transformation of radially symmetric Bessel ...
  • Soliton control in chirped photonic lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2005-07)
    Article
    Accés restringit per política de l'editorial
    We study optical solitons in chirped periodic optical lattices whose amplitude or frequency changes in the transverse direction. We discover that soliton propagation in such lattices can be accompanied by the progressive ...
  • Soliton generation by counteracting gain-guiding and self-bending 

    Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-11-01)
    Article
    Accés restringit per política de l'editorial
    We introduce a concept for stable spatial soliton formation, mediated by the competition between self-bending induced by a strongly asymmetric nonlocal nonlinearity and spatially localized gain superimposed on a wide ...
  • Soliton spiraling in optically induced rotating Bessel lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2005-03)
    Article
    Accés restringit per política de l'editorial
    We address soliton spiraling in optical lattices induced by multiple coherent Bessel beams and show that the dynamic nature of such lattices makes it possible for them to drag different soliton structures, setting them ...
  • Soliton trains in photonic lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-06)
    Article
    Accés restringit per política de l'editorial
    We address the formation and propagation of multi-spot soliton packets in saturable Kerr nonlinear media with an imprinted harmonic transverse modulation of the refractive index. We show that, in sharp contrast to homogeneous ...
  • Solitons in geometric potentials 

    Kartashov, Yaroslav; Szameit, A.; Keil, R.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-07-01)
    Article
    Accés restringit per política de l'editorial
    We show that the geometrically induced potential existing in undulated slab waveguides dramatically affects the properties of solitons. In particular, whereas solitons residing in the potential maxima do not feature power ...
  • Solitons in spiraling Vogel lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2013-01-15)
    Article
    Accés restringit per política de l'editorial
    We address light propagation in Vogel optical lattices and show that such lattices support a variety of stable soliton solutions in both self-focusing and self-defocusing media, whose propagation constants belong to domains ...
  • Solitons supported by spatially inhomogeneous nonlinear losses 

    Borovkova, Olga V.; Kartashov, Yaroslav; Vysloukh, Victor A.; Lobanov, Valery E.; Malomed, Boris A.; Torner Sabata, Lluís (2012)
    Article
    Accés restringit per política de l'editorial
    We uncover that, in contrast to the common belief, stable dissipative solitons exist in media with uniform gain in the presence of nonuniform cubic losses, whose local strength grows with coordinate η (in one dimension) ...
  • 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 ...
  • 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 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 ...
  • 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 ...