Now showing items 21-40 of 47

    • Soliton content with quadratic nonlinearities 

      Artigas García, David; Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru; Mazilu, D (1999-06)
      Article
      Open Access
      Summary form only given. Quadratic solitons, that form through cascading in materials with second-order nonlinearities, are a topic of current intense investigation. Solitons have been observed in second harmonic generation ...
    • Soliton content with quadratic nonlinearities 

      Artigas García, David; Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru; Mazilu, Dumitru (Optical Society of American (OSA), 1999)
      Conference lecture
      Open Access
      Summary form only given. Quadratic solitons, that form through cascading in materials with second-order nonlinearities, are a topic of current intense investigation. Solitons have been observed in second harmonic generation ...
    • Soliton solutions for a perturbed nonlinear Schrodinger equation 

      Mihalache, Dumitru; Torner Sabata, Lluís; Moldoveanu, F.; Panoiu, N.-C.; Truta, N. (1993-11)
      Article
      Restricted access - publisher's policy
      Using the inverse scattering transform the authors found one-parameter and the breather-like four-parameter soliton solutions of a perturbed nonlinear Schrodinger equation which describes the pulse propagation in optical ...
    • Spatial walking solitons in quadratic nonlinear crystals 

      Torner Sabata, Lluís; Mihalache, Dumitru; Mazilu, Dumitru; Santos Blanco, M. Concepción; Akhmediev, Nail (Optical Society of America, 1998)
      Article
      Open Access
      We investigate the properties of the families of spatial walking solitons propagating in planar waveguides made of quadratic nonlinear media under conditions for second-harmonic generation in the presence of Poynting vector ...
    • 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 ...
    • Spatiotemporal optical solitons 

      Malomed, B A; Mihalache, Dumitru; Wise, F; Torner Sabata, Lluís (2005-04)
      Article
      Restricted access - publisher's policy
      In the course of the past several years, a new level of understanding has been achieved about conditions for the existence, stability, and generation of spatiotemporal optical solitons, which are nondiffracting and ...
    • Stability of spatial solitary waves in quadratic media 

      Torner Sabata, Lluís; Mihalache, Dumitru; Mazilu, D; Amhmediev, N (1995-11)
      Article
      Restricted access - publisher's policy
      We investigate the stability of bright solitary waves formed by the mutual trapping of the fundamental and second-harmonic waves propagating in a nonlinear quadratic medium. First, we find that most of the solitary waves ...
    • Stability of walking vector solitons 

      Mihalache, Dumitru; Mazilu, D; Torner Sabata, Lluís (1998-11)
      Article
      Restricted access - publisher's policy
      The stability of two-parameter families of walking vector solitons of coupled nonlinear Schrödinger equations in investigated. It is shown that all known, lowest-order soliton types, namely, slow, fast, vector in phase, ...
    • Stable 3D solitons supported by competing quadratic and self-focusing cubic nonlinearities 

      Mihalache, Dumitru; Mazilu, D; Malomed, B A; Lederer, F; Crasovan, L -C; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2006-10)
      Article
      Restricted access - publisher's policy
      We show that the quadratic (¿(2)) interaction of fundamental and second harmonics in a bulk dispersive medium, combined with self-focusing cubic (¿(3)) nonlinearity, give rise to stable three-dimensional spatiotemporal ...
    • 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 solitons of even and odd parities supported by competing nonlocal nonlinearities 

      Mihalache, Dumitru; Mazilu, D; Lederer, F; Crasovan, L -C; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Malomed, B A (2006-12)
      Article
      Restricted access - publisher's policy
      We introduce a one-dimensional phenomenological model of a nonlocal medium featuring focusing cubic and defocusing quintic nonlocal optical nonlinearities. By means of numerical methods, we find families of solitons of two ...
    • 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 ...
    • Stable three-dimensional spatiotemporal solitons in a two-dimensional phototnic lattice 

      Mihalache, Dumitru; Mazilu, Dumitru; Lederer, F.; Kartashov, Yaroslav V.; Crasovan, L.C.; Torner Sabata, Lluís (2004-11)
      Article
      Restricted access - publisher's policy
      We investigate the existence and stability of three-dimensional spatiotemporal solitons in self-focusing cubic Kerr-type optical media with an imprinted two-dimensional harmonic transverse modulation of the refractive ...
    • Stable vortex dipoles in nonrotating Bose-Einstein condensates 

      Crasovan, L -C; Vekslerchik, V; Perez García, Victor M.; Pérez Torres, Juan; Mihalache, Dumitru; Torner Sabata, Lluís (2003-12)
      Article
      Restricted access - publisher's policy
      We find stable families of vortex dipoles in nonrotating Bose-Einstein condensates. The vortex dipoles correspond to topological excited collective states of the condensed atoms. They exist and are dynamically and structurally ...
    • Stable vortex tori in the three-dimensional cubic-quintic Ginzburg-Landau equation 

      Mihalache, Dumitru; Mazilu, D; Lederer, F; Kartashov, Yaroslav V.; Crasovan, L -C; Torner Sabata, Lluís; Malomed, B A (2006-08)
      Article
      Restricted access - publisher's policy
      We demonstrate the existence of stable toroidal dissipative solitons with the inner phase field in the form of rotating spirals, corresponding to vorticity S=0, 1, and 2, in the complex Ginzburg-Landau equation with the ...
    • Stationary trapping of light beams in bulk second-order nonlinear media 

      Torner Sabata, Lluís; Mihalache, Dumitru; Mazilu, D; Wright, E M; Torruellas, W E; Stegeman, G I (1995-12)
      Article
      Restricted access - publisher's policy
      The mutual trapping of fundamental and second harmonic, continuous-wave light beams propagating in bulk second-order nonlinear media is studied. We find numerically families of stationary, radially symmetric solitary waves. ...
    • Stationary walking solitons in bulk quadratic nonlinear media 

      Mihalache, Dumitru; Mazilu, D; Crasonavn, L C; Torner Sabata, Lluís (1997-04)
      Article
      Restricted access - publisher's policy
      We study the mutual trapping of fundamental and second-harmonic light beams propagating in bulk quadratic nonlinear media in the presence of Poynting vector beam walk-off. We show numerically the existence of a two-parameter ...
    • 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 ...