Now showing items 1-19 of 19

  • Arresting wave collapse by wave self-rectification 

    Crasovan, L C; Pérez Torres, Juan; Mihalache, Dumitru; Torner Sabata, Lluís (2003-08)
    Article
    Restricted access - publisher's policy
    We put forward a mechanism for tailoring, and even arresting, the collapse of wave packets in nonlinear media, whose dynamics is governed by nonlocal two-dimensional nonlinear Schrödinger-like equations. The key ingredient ...
  • Enhanced localization of Dyakonov-like surface waves in left-handed materials 

    Crasovan, L C; Takayama, Osamu; Artigas García, David; Johansen, S K; Mihalache, Dumitru; Torner Sabata, Lluís (2006-10)
    Article
    Restricted access - publisher's policy
    We address the existence and properties of hybrid surface waves forming at interfaces between left-handed materials and dielectric birefringent media. The existence conditions of such waves are found to be highly relaxed ...
  • Globally-linked vortex clusters 

    Crasovan, L C; Vekslerchik, V; Mihalache, Dumitru; Pérez Torres, Juan; Perez-Garcia, V M; Torner Sabata, Lluís (Kluwer, 2004-09-30)
    Part of book or chapter of book
    Restricted access - publisher's policy
    We show the existence of a rich variety of fully stationary vortex structures made of an increasing number of vortices nested in paraxial wave fields confined by symmetric and asymmetric harmonic trapping potentials in ...
  • Method for generating solitons sustained by competing nonlinearities by use of optical rectification 

    Pérez Torres, Juan; Palacios, S L; Torner Sabata, Lluís; Crasovan, L C; Mihalache, Dumitru; Biaggio, I (2002-09)
    Article
    Restricted access - publisher's policy
    We put forward a method for generating engineerable competing quadratic and cubic nonlinearities in suitable settings in which frequency generation is accompanied by optical rectification. The novel scheme is based on the ...
  • Multicolor vortex solitons in two-dimensional photonic lattices 

    Xu, Zhiyong; Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2005-01)
    Article
    Restricted access - publisher's policy
    We report on the existence and stability of multicolor lattice vortex solitons constituted by coupled fundamental frequency and second-harmonic waves in optical lattices in quadratic nonlinear media. It is shown that the ...
  • Optical Dyakonov surface waves at magnetic interfaces 

    Crasovan, L C; Artigas García, David; Mihalache, Dumitru; Torner Sabata, Lluís (2005-11)
    Article
    Restricted access - publisher's policy
    We address the existence and properties of lossless surface waves that form at interfaces between magnetic and birefringent media. We show that the angular domain of existence of Dyakonov surface waves for magnetic interfaces ...
  • Robust propagation of two-color soliton clusters supported by competing nonlinearities 

    Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2002-12)
    Article
    Restricted access - publisher's policy
    We reveal numerically the remarkably robust propagation of quasistationary two-color soliton clusters in media with competing quadratic and cubic nonlinearities. We predict that such clusters carrying nonzero angular ...
  • Soliton clusters in 3D media with competing cubic and quintic nonlinearities 

    Mihalache, Dumitru; Mazilu, D; Crasovan, L C; Malomed, B A; Lederer, F; Torner Sabata, Lluís (2004-04)
    Article
    Restricted access - publisher's policy
    We introduce a class of robust soliton clusters composed of N fundamental solitons in three-dimensional media combining the self-focusing cubic and self-defocusing quintic nonlinearities. The angular momentum is lent to ...
  • Soliton eigenvalue control in optical lattices 

    Kartashov, Yaroslav V.; Crasovan, L C; Zelenina, A; Vyslokh, V V; Sanpera, Anna; Lewenstein, Maciej; Torner Sabata, Lluís (2004-09)
    Article
    Restricted access - publisher's policy
    We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential introduced by the lattice, ...
  • Soliton molecules: robust clusters of light bullets 

    Crasovan, L C; Kartashov, Yaroslav V.; Milahache, D; Torner Sabata, Lluís; Kivshar, Y; Perezgarcia, V (2003-04)
    Article
    Restricted access - publisher's policy
    We show how to generate robust self-sustained clusters of soliton bullets—spatiotemporal (optical or matter-wave) solitons. The clusters carry an orbital angular momentum being supported by competing nonlinearities. The ...
  • Spatiotemporal discrete multicolor solitons 

    Xu, Zhiyong; Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2004-12)
    Article
    Restricted access - publisher's policy
    We have found various families of two-dimensional spatiotemporal solitons in quadratically nonlinear waveguide arrays. The families of unstaggered odd, even, and twisted stationary solutions are thoroughly characterized ...
  • Stable 3D spinning optical solitons supported by competing quadratic and cubic nonlinearities 

    Mihalache, Dumitru; Mazilu, D; Crasovan, L C; Towers, I; Malomed, B A; Buryak, A V; Torner Sabata, Lluís; Lederer, F (2002-09)
    Article
    Restricted access - publisher's policy
    We show that the quadratic interaction of fundamental and second harmonics in a bulk dispersive medium, combined with self-defocusing cubic nonlinearity, gives rise to completely localized spatiotemporal solitons (vortex ...
  • Stable spatiotemporal solitons in Bessel optical lattices 

    Mihalache, Dumitru; Mazilu, D; Lederer, F; Malomed, B A; Kartashov, Yaroslav V.; Crasovan, L C; Torner Sabata, Lluís (2005-08)
    Article
    Restricted access - publisher's policy
    We investigate the existence and stability of three-dimensional solitons supported by cylindrical Bessel lattices in self-focusing media. If the lattice strength exceeds a threshold value, we show numerically, and using ...
  • Stable three-dimensional solitons in attarctive Bose-Einstein condensates loaded in an optical lattice 

    Mihalache, Dumitru; Mazilu, D; Lederer, F; Malomed, B A; Crasovan, L C; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2005-08)
    Article
    Restricted access - publisher's policy
    The existence and stability of solitons in Bose-Einstein condensates with attractive interatomic interactions, described by the Gross-Pitaevskii equation with a three-dimensional (3D) periodic potential, are investigated ...
  • Tandem light bullets 

    Torner Sabata, Lluís; Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Crasovan, L C; Mihalache, Dumitru (2001-11)
    Article
    Restricted access - publisher's policy
    We put forward a novel strategy to achieve formation of fully three-dimensional light bullets. The new scheme is based on tandem structures where nonlinearity and group-velocity dispersion required for the self-trapping ...
  • Three-dimensional parallel vortex rings in Bose-Einstein condensates 

    Crasovan, L C; Perez García, Victor M.; Danaila, I; Mihalache, Dumitru; Torner Sabata, Lluís (2004-10)
    Article
    Restricted access - publisher's policy
    We construct three-dimensional structures of topological defects hosted in trapped wave fields, in the form of vortex stars, vortex cages, parallel vortex lines, perpendicular vortex rings, and parallel vortex rings, and ...
  • Three-dimensional spatiotemporal optical solitons in nonlocal nonlinear media 

    Mihalache, Dumitru; Mazilu, D; Lederer, F; Malomed, B A; Kartashov, Yaroslav V.; Crasovan, L C; Torner Sabata, Lluís (2006-01)
    Article
    Restricted access - publisher's policy
    We demonstrate the existence of stable three-dimensional spatiotemporal solitons (STSs) in media with a nonlocal cubic nonlinearity. Fundamental (nonspinning) STSs forming one-parameter families are stable if their propagation ...
  • Walking solitons 

    Torner Sabata, Lluís; Santos Blanco, M. Concepción; Mihalache, Dumitru; Mazilu, D; Crasovan, L C (1997-12)
    Article
    Restricted access - publisher's policy
    By and large, optical
  • Walking solitons in type II second-harmonic generation 

    Mihalache, Dumitru; Mazilu, D; Crasovan, L C; Torner Sabata, Lluís (1997-12)
    Article
    Restricted access - publisher's policy
    We find the families of spatial walking solitons propagating in quadratic nonlinear media under conditions for type II second-harmonic generation in the presence of Poynting vector walk-off between the interacting beams. ...