Now showing items 1-12 of 12

  • Anderson localization in Bragg-guiding arrays with negative defects 

    Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-10)
    Article
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    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
    Open Access
    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
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    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 (APS Physics, 2015-06-18)
    Article
    Open Access
    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
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    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
    Open Access
    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
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    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
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    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
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    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, Lluis (OSA, 2015-03-11)
    Article
    Open Access
    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 vortex-soliton tori with multiple nested phase singularities in dissipative media 

    Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav; Torner Sabata, Lluís (2012)
    Article
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    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
    Restricted access - publisher's policy
    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 ...