Enviaments recents

  • Stable multicolor periodic-wave arrays 

    Kartashov, Yaroslav V.; Egorov, A A; Zelenina, A S; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-01)
    Article
    Accés restringit per política de l'editorial
    We study the existence and stability of periodic-wave arrays propagating in uniform quadratic nonlinear media and discover that they become completely stable above a threshold light intensity. To the best of our knowledge, ...
  • Observation of self-trapping of light in walk-off compensating tandems 

    Carrasco Rodríguez, Sílvia; Petrov, D V; Pérez Torres, Juan; Torner Sabata, Lluís; Kim, H; Stegeman, G I; Zondy, J J (2004-02)
    Article
    Accés restringit per política de l'editorial
    We report the first experimental observation, to our knowledge, of the self-trapping of light in walk-off-compensating optical tandems. The experiment was conducted with picosecond light pulses in a ten-plate optically ...
  • Quasi-phase-matching engineering for spatial control of entangled two-photon states 

    Pérez Torres, Juan; Alexandescu, A; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (2004-02)
    Article
    Accés restringit per política de l'editorial
    We show that transverse engineering of quasi-phase-matched geometries can be used to tailor the spatial mode function that describes the quantum state of photon pairs generated in spontaneous parametric downconversion. We ...
  • Spatial soliton switching in quasi-continuous optical arrays 

    Kartashov, Yaroslav V.; Zelenina, A S; Torner Sabata, Lluís; Vysloukh, Victor A. (2004-03)
    Article
    Accés restringit per política de l'editorial
    We report on the phenomenon of trapping and switching of one-dimensional spatial solitons in Kerr-type nonlinear media with transverse periodic modulation of the refractive index. The solitons slowly radiate upon propagation ...
  • 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, ...
  • Multicolor lattice solitons 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2004-05)
    Article
    Accés restringit per política de l'editorial
    We report on the existence of multicolor solitons supported by periodic lattices made from quadratic nonlinear media. Such lattice solitons bridge the gap between continuous solitons in uniform media and discrete solitons ...
  • 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
    Accés obert
    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 ...
  • Parametric amplification of soliton steering in optical lattices 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2004-05)
    Article
    Accés restringit per política de l'editorial
    We report on the effect of parametric amplification of spatial soliton swinging in Kerr-type nonlinear media with longitudinal and transverse periodic modulation of the linear refractive index. The parameter areas are found ...
  • Soliton trains in photonic lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-06)
    Article
    Accés restringit per política de l'editorial
    We address the formation and propagation of multi-spot soliton packets in saturable Kerr nonlinear media with an imprinted harmonic transverse modulation of the refractive index. We show that, in sharp contrast to homogeneous ...
  • Rotary solitons in Bessel optical lattices 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2004-08)
    Article
    Accés restringit per política de l'editorial
    We introduce solitons supported by Bessel photonic lattices in cubic nonlinear media. We show that the cylindrical geometry of the lattice, with several concentric rings, affords unique soliton properties and dynamics. In ...

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