Ara es mostren els items 10-29 de 108

    • Cnoidal wave patterns in quadratic nonlinear media 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2003-07)
      Article
      Accés restringit per política de l'editorial
      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, ...
    • Composite vortex-ring solitons in Bessel photonic lattices 

      Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2005-07)
      Article
      Accés restringit per política de l'editorial
      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 ...
    • Diffraction control in P T -symmetric photonic lattices: from beam rectification to dynamic localization 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Konotop, Vladimir V; Torner Sabata, Lluís (2016-01-21)
      Article
      Accés obert
      We address the propagation of light beams in longitudinally modulated PT-symmetric lattices, built as arrays of couplers with periodically varying separation between their channels, and show a number of possibilities for ...
    • Diffraction managements of focused light beams in optical lattices with a quadratic frequency modulation 

      Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2005-05)
      Article
      Accés restringit per política de l'editorial
      We reveal that the effective diffraction experienced by light beams launched along the central guiding channel of optical lattice with a quadratic frequency modulation can be tuned in strength and sign. Complete suppression ...
    • Disorder-induced soliton transmission in nonlinear photonic lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-02-15)
      Article
      Accés restringit per política de l'editorial
      We address soliton transmission and reflection in nonlinear photonic lattices embedded into uniform Kerr nonlinear media. We show that by introducing disorder into the guiding lattice channels, one may achieve soliton ...
    • Dispersion-managed cnoidal pulse trains 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Marti-Panameño, E.; Artigas García, David; Torner Sabata, Lluís (2003-08)
      Article
      Accés restringit per política de l'editorial
      We report on the existence and properties of breathing periodic cnoidal pulse trains propagating in dispersion managed systems with piecewise constant dispersion. Our numerical investigations show that the dispersion ...
    • Dissipative defect modes in periodic structures 

      Kartashov, Yaroslav; Konotop, Vladimir V; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-05-15)
      Article
      Accés restringit per política de l'editorial
      We show that periodic optical lattices imprinted in cubic nonlinear media with strong two-photon absorption and localized linear gain landscapes support stable dissipative defect modes in both focusing and defocusing media. ...
    • 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 ...
    • Dynamics of surface solitons at the edge of chirped optical lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2007-07)
      Article
      Accés restringit per política de l'editorial
      We address soliton formation at the edge of chirped optical lattices imprinted in Kerr-type nonlinear media. We find families of power thresholdless surface waves that do not exist at other types of lattice interfaces. ...
    • Eigenvalue control and switching by fission of multisoliton bound states in planar waveguides 

      Aleshkevich, V A; Kartashov, Yaroslav V.; Zelenina, A S; Vysloukh, Victor A.; Pérez Torres, Juan; Torner Sabata, Lluís (2004-03)
      Article
      Accés restringit per política de l'editorial
      We report the results of numerical studies of the fission of ¿-soliton bound states at the interface formed by a Kerr nonlinear medium and a linear dielectric in a planar waveguide. A variety of effects are shown to occur, ...
    • Engineering soliton nonlinearities: from local to strongly nonlocal 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
      Article
      Accés restringit per política de l'editorial
      We put forward what we believe to be a novel strategy to achieve synthetic nonlinearities where local and nonlocal contributions compete on a similar footing, thus yielding intermediate tunable responses ranging from local ...
    • Enhancement and inhibition of light tunneling mediated by resonant mode conversion 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2014-02-15)
      Article
      Accés restringit per política de l'editorial
      We show that the rate at which light tunnels between neighboring multimode waveguides can be drastically increased or reduced by the presence of small longitudinal periodic modulations of the waveguide properties that ...
    • Gap solitons on a ring 

      Kartashov, Yaroslav V.; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-12)
      Article
      Accés restringit per política de l'editorial
      We introduce a new species of gap solitons (GSs) supported by an azimuthally modulated guiding ring in defocusing cubic media. The periodicity in the azimuthal direction strongly modifies properties and existence domains ...
    • 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 ...
    • Generation of arbitrary complex quasi-non-diffracting optical patterns 

      Ortiz Ambriz, Antonio; López Aguayo, Servando; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Petrov, Dimitri; Garcia Gracia, Hipolito; Gutierrez Vega, Julio Cesar; Torner Sabata, Lluís (2013-09)
      Article
      Accés restringit per política de l'editorial
      Due to their unique ability to maintain an intensity distribution upon propagation, non-diffracting light fields are used extensively in various areas of science, including optical tweezers, nonlinear optics and quantum ...
    • Generation of surface soliton arrays 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Mihalache, Dumitru; Torner Sabata, Lluís (2006-07)
      Article
      Accés restringit per política de l'editorial
      We discover that, at the edge of an optical lattice imprinted in a saturable nonlinear medium, one-dimensional surface solitons exist only within a band of light intensities and that they cease to exist when the lattice ...
    • Highly-asymmetric soliton complexes in parabolic optical lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-01)
      Article
      Accés restringit per política de l'editorial
      We introduce multipole soliton complexes in optical lattices induced by nondiffracting parabolic beams. Despite the symmetry breaking dictated by the curvature of the lattice channels, we find that complex, asymmetric ...
    • Hybrid bloch-anderson localization of light 

      Stützer, Simon; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Konotop, Vladimir V; Nolte, Stefan; Torner Sabata, Lluís; Szameit, Alexander (2013-04-26)
      Article
      Accés restringit per política de l'editorial
      We investigate the interplay of Bloch oscillations and Anderson localization in optics. Gradual washing out of Bloch oscillations and the formation of nearly stationary averaged intensity distributions, which are symmetric ...
    • Inhibition of light tunneling in waveguide arrays 

      Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Heinrich, Matthias; Pertsch, T; Nolte, Stefan; Tunnermann, A; Vysloukh, Victor A.; Lederer, F; Torner Sabata, Lluís (2009-04)
      Article
      Accés restringit per política de l'editorial
      We report the observation of almost perfect light tunneling inhibition at the edge and inside laser-written waveguide arrays due to band collapse. When the refractive index of the guiding channels is harmonically modulated ...