Now showing items 1-20 of 162

  • Algebraic bright and vortex solitons in defocusing media 

    Borovkova, Olga V.; Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2011-08-15)
    Article
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    We demonstrate that spatially inhomogeneous defocusing nonlinear landscapes with the nonlinearity coefficient growing toward the periphery as (1+|¿|¿) support one- and two-dimensional fundamental and higher-order bright ...
  • Anderson cross-localization 

    Stützer, Simon; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Tünnermann, A.; Nolte, Stefan; Lewenstein, Maciej; Torner Sabata, Lluís; Szameit, Alexander (2012)
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    We report Anderson localization in two-dimensional optical waveguide arrays with disorder in waveguide separation introduced along one axis of the array, in an uncorrelated fashion for each waveguide row. We show that the ...
  • Anderson localization in Bragg-guiding arrays with negative defects 

    Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-10)
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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 ...
  • Angular surface slitons in sectorial hexagonal arrays 

    Szameit, Alexander; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Heinrich, Matthias; Dreisow, Felix; Pertsch, T; Nolte, Stefan; Tünnermann, A; Lederer, F; Torner Sabata, Lluís (2008-07)
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    We report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. The face angle between these interfaces has ...
  • Asymmetric matter-wave solitons at nonlinear interfaces 

    Ye, F; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2006-12)
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    We predict the existence and study the basic properties of strongly asymmetric matter wave solitons that form at the interface produced by regions with different interatomic interaction strengths in pancake Bose-Einstein ...
  • Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2016-09-15)
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    We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility ...
  • 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 ...
  • Bloch oscillations in optical and Zeeman lattices in the presence of spin-orbit coupling 

    Kartashov, Yaroslav V.; Konotop, Vladimir V; Zezyulin, Dmitry A; Torner Sabata, Lluís (2016-11-18)
    Article
    Open Access
    We address Bloch oscillations of a spin-orbit coupled atom in periodic potentials of two types: optical and Zeeman lattices. We show that in optical lattices the spin-orbit coupling allows controlling the direction of ...
  • Bloch-wave packet control in truncated modulated optical lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-12-15)
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    We study the reflection of Bloch wave packets at the interface of an optical lattice possessing a shallow longitudinal out-of-phase refractive index modulation in the adjacent waveguides. We show that the relation between ...
  • Bound states in the continuum in a two-dimensional PT - symmetric system 

    Kartashov, Yaroslav V.; Milian, Carles; Konotop, Vladimir V; Torner Sabata, Lluís (2018-02-01)
    Article
    Open Access
    We address a 2D parity-time (¿¿)-symmetric structure built as a chain of waveguides, where all waveguides except for the central one are conservative, while the central one is divided into two halves with gain and losses. ...
  • Bound states in the continuum in spin-orbit-coupled atomic systems 

    Kartashov, Yaroslav V.; Konotop, Vladimir V; Torner Sabata, Lluís (2017-09-14)
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    We show that the interplay between spin-orbit coupling and Zeeman splitting in atomic systems can lead to the existence of bound states in the continuum (BICs) supported by trapping potentials. Such states have energies ...
  • Bragg guiding of domainlike nonlinear modes and kink arrays in lower-index core structures 

    Ye, F; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-06)
    Article
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    We introduce a novel class of stable nonlinear modes trapped in a lower-index film core sandwiched between two optical lattices, or in the cylindrical core of a radial lattice, imprinted in defocusing media. Such a family ...
  • Bragg-type soliton mirror 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2006-02)
    Article
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    We study soliton reflection/transmission at the interface between uniform medium and the optical lattice with focusing Kerr nonlinearity. We reveal that such interfaces afford rich new opportunities for controlling the ...
  • Brownian soliton motion 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-05)
    Article
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    We reveal fundamental analogies between soliton dynamics in light-induced random photonic lattices and Brownian motion of particles. In particular, we discover that the average squared soliton displacement increases linearly ...
  • Cavity solitons in a microring dimer with gain and loss 

    Milián, Carles; Kartashov, Yaroslav V.; Skryabin, Dmitry V.; Torner Sabata, Lluís (2018-02-20)
    Article
    Open Access
    We address a pair of vertically coupled microring resonators with gain and loss pumped by a single-frequency field. Coupling between microrings results in a twofold splitting of the single microring resonance that increases ...
  • Clusters of cavity solitons bounded by conical radiation 

    Milián, Carles; Kartashov, Yaroslav V.; Skryabin, Dmitry V.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2018-09-06)
    Article
    Open Access
    We introduce a new class of self-sustained states, which may exist as single solitons or form multisoliton clusters, in driven passive cylindrical microresonators. Remarkably, such states are stabilized by the radiation ...
  • Cnoidal wave patterns in quadratic nonlinear media 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2003-07)
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    We report the existence of whole families of stationary cnoidal, periodic wave patterns in quadratic nonlinear media. We study the main physical features of the multicolored light patterns, including their shape, contrast, ...
  • Compactons and bistability in exciton-polariton condensates 

    Kartashov, Yaroslav V.; Konotop, Vladimir V; Torner Sabata, Lluís (2012-11-15)
    Article
    Open Access
    We address stationary patterns in exciton-polariton condensates supported by a narrow external pump beam, and we discover that even in the absence of trapping potentials, such condensates may support stable localized stationary ...
  • Composite vortex-ring solitons in Bessel photonic lattices 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2005-07)
    Article
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    We reveal the existence of dynamically stable, composite topological solitons in Bessel photonic lattices imprinted in focusing Kerr-type nonlinear media. The new stable, composite solitons are made of a vortex ring with ...