Ara es mostren els items 1-18 de 18

    • Anderson localization in Bragg-guiding arrays with negative defects 

      Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-10)
      Article
      Accés restringit per política de l'editorial
      We show that Anderson localization is possible in waveguide arrays with periodically spaced defect waveguides having a lower refractive index. Such localization is mediated by Bragg reflection, and it takes place even if ...
    • Anderson localization of light with topological dislocations 

      Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2013-11-01)
      Article
      Accés obert
      We predict Anderson localization of light with nested screw topological dislocations propagating in disordered two-dimensional arrays of hollow waveguides illuminated by vortex beams. The phenomenon manifests itself in the ...
    • Asymmetric solitons and domain walls supported by inhomogeneous defocusing nonlinearity 

      Kartashov, Yaroslav V.; Lobanov, Valery E.; Malomed, Boris A.; Torner Sabata, Lluís (2013-12-01)
      Article
      Accés restringit per política de l'editorial
      We show that an inhomogeneous defocusing nonlinearity that grows toward the periphery in the positive and negative transverse directions at different rates can support strongly asymmetric fundamental and multipole bright ...
    • Dynamic versus Anderson wave-packet localization 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2015-06-18)
      Article
      Accés obert
      We address the interplay between two fundamentally different wave-packet localization mechanisms, namely, resonant dynamic localization due to collapse of quasienergy bands in periodic media and disorder-induced Anderson ...
    • Dynamic versus Anderson wave-packet localization 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (APS Physics, 2015-06-18)
      Article
      Accés obert
      We address the interplay between two fundamentally different wavepacket localization mechanisms, namely resonant dynamic localization due to collapse of quasi-energy bands in periodic media and disorder-induced Anderson ...
    • General quasi-nonspreading linear three-dimensional wave packets 

      Borovkova, Olga V.; Kartashov, Yaroslav; Lobanov, Valery E.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-06-15)
      Article
      Accés restringit per política de l'editorial
      We introduce a general approach for generation of sets of three-dimensional quasi-nonspreading wave packets propagating in linear media, also referred to as linear light bullets. The spectrum of rigorously nonspreading ...
    • Light bullets by synthetic diffraction-dispersion matching 

      Lobanov, Valery E.; Kartashov, Yaroslav; Torner Sabata, Lluís (2010-07-03)
      Article
      Accés obert
      We put forward a new approach to generate stable, fully three-dimensional light bullets, which is based on the matching of the intrinsic material dispersion with a suitable effective diffraction. The matching is achieved ...
    • Rotating vortex solitons supported by localized gain 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav; Torner Sabata, Lluís (2011-05-15)
      Article
      Accés restringit per política de l'editorial
      We show that ringlike localized gain landscapes imprinted in focusing cubic (Kerr) nonlinear media with strong two-photon absorption support new types of stable higher-order vortex solitons containing multiple phase ...
    • 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 ...
    • 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) ...
    • Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling 

      Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V.; Lobanov, Valery E.; Torner Sabata, Lluís (OSA, 2015-03-11)
      Article
      Accés obert
      We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ...
    • Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling 

      Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V.; Lobanov, Valery E.; Torner Sabata, Lluís (2015-03-15)
      Article
      Accés obert
      We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ...
    • Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling 

      Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V; Lobanov, Valery E.; Torner Sabata, Lluís (2015-03-15)
      Article
      Accés restringit per política de l'editorial
      We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ...
    • Stable bright and vortex solitons in photonic crystal fibers with inhomogeneous defocusing nonlinearity 

      Lobanov, Valery E.; Borovkova, Olga V.; Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2012-06-01)
      Article
      Accés restringit per política de l'editorial
      We predict that a photonic crystal fiber whose strands are filled with a defocusing nonlinear medium can support stable bright solitons and also vortex solitons if the strength of the defocusing nonlinearity grows toward ...
    • 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 vortex-soliton tori with multiple nested phase singularities in dissipative media 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav; Torner Sabata, Lluís (2012)
      Article
      Accés restringit per política de l'editorial
      We show the existence of stable two- and three-dimensional vortex solitons carrying multiple, spatially separated, single-charge topological dislocations nested in a common vortex-ring core. Such nonlinear states are ...
    • 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 ...
    • 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 ...