Now showing items 21-40 of 167

    • 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
      Open Access
      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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 ...
    • Dynamic localization in optical and Zeeman lattices in the presence of spin-orbit coupling 

      Kartashov, Yaroslav V.; Konotop, Vladimir V; Zezyulin, Dmitry A; Torner Sabata, Lluís (2016-12-08)
      Article
      Open Access
      The dynamic localization of a two-level atom in a periodic potential under the action of spin-orbit coupling and a weak harmonically varying linear force is studied. We consider optical and Zeeman potentials that are either ...
    • 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 ...
    • 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
      Open Access
      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 ...
    • Dynamics of surface solitons at the edge of chirped optical lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2007-07)
      Article
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 ...
    • Enhaced soliton interactions by inhomogeneous nonlinearity and nonlocality (artno 33812) 

      Ye, F; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2007-09)
      Article
      Restricted access - publisher's policy
      Ocean waves are complex and often turbulent. While most ocean-wave interactions are essentially linear, sometimes two or more waves interact in a nonlinear way. For example, two or more waves can interact and yield waves ...
    • Enhancement and inhibition of light tunneling mediated by resonant mode conversion 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2014-02-15)
      Article
      Restricted access - publisher's policy
      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 in a spin-orbit-coupled bose-einstein condensate 

      Kartashov, Yaroslav V.; Konotop, Vladimir V; Abdullaev, Fatkhulla Kh (2013-08)
      Article
      Open Access
      We report a diversity of stable gap solitons in a spin-orbit-coupled Bose-Einstein condensate subject to a spatially periodic Zeeman field. It is shown that the solitons can be classified by the main physical symmetries ...
    • Gap solitons on a ring 

      Kartashov, Yaroslav V.; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-12)
      Article
      Restricted access - publisher's policy
      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 ...
    • Gap solitons supported by optical lattices in photorefractive crystals with asymmetric nonlocality 

      Xu, Zhiyong; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2006-06)
      Article
      Restricted access - publisher's policy
      We address the impact of the asymmetric nonlocal diffusion nonlinearity of gap solitons supported by photorefractive crystals with an imprinted optical lattice. We reveal how the asymmetric nonlocal response alters the ...
    • 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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 ...
    • Gray spatial solitons in nonlocal nonlinear media 

      Kartashov, Yaroslav V.; Torner Sabata, Lluís (2007-04)
      Article
      Restricted access - publisher's policy
      We study gray solitons in nonlocal nonlinear media and show that they are stable and can form bound states. We reveal that the gray soliton velocity depends on the nonlocality degree and that it can be drastically reduced ...
    • Guiding-center solitons in rotating potentials 

      Kartashov, Yaroslav V.; Malomed, Boris A; Torner Sabata, Lluís (2007-06)
      Article
      Restricted access - publisher's policy
      We demonstrate that rotating quasi-one-dimensional potentials, periodic or parabolic, support solitons in settings where they are otherwise impossible. Ground-state and vortex solitons are found in defocusing media, if the ...
    • Highly-asymmetric soliton complexes in parabolic optical lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-01)
      Article
      Restricted access - publisher's policy
      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 ...