Ara es mostren els items 396-413 de 413

    • Vector mixed-gap surface solitons 

      Kartashov, Yaroslav V.; Ye, F; Torner Sabata, Lluís (2006-05)
      Article
      Accés restringit per política de l'editorial
      We elucidate the properties of mixed-gap vector surface solitons supported by the interface between a uniform medium and an optical lattice imprinted in a Kerr-type nonlinear media. The components of such mixed-gap solitons ...
    • Vector soliton fission by reflection at nonlinear interfaces 

      Fangwei, Ye; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2007-01)
      Article
      Accés restringit per política de l'editorial
      We address the reflection of vector solitons, comprising several components that exhibit multiple field oscillations, at the interface between two nonlinear media. We reveal that reflection causes fission of the input ...
    • Vortex evolution in parametric wave mixing 

      Petrov, D V; Molina Terriza, Gabriel; Torner Sabata, Lluís (1999-04)
      Article
      Accés obert
      We investigate the evolution of vortex wave front dislocations in multiple-wave second-harmonic generation processes in quadratic nonlinear media. Vortices nested in finite-size host beams are shown to nucleate and to ...
    • Vortex lattice solitons supported by localized gain 

      Kartashov, Yaroslav V.; Konotop, Vladimir V; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-10-01)
      Article
      Accés restringit per política de l'editorial
      We show that localized gain supports the existence of dissipative vortex solitons in periodic Kerr media with strong two-photon absorption. Vortex solitons exist in both focusing and defocusing media, with their propagation ...
    • Vortex nucleation and evolution in parametric wave mixing 

      Molina Terriza, Gabriel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      We predict a variety of new phenomena, that includes the spontaneous nucleation of multiple vortex twins, vortex rotation and drift, vortex-antivortex interaction and annihilation, and formation of quasi-aligned patterns ...
    • Vortex revivals with trapped light 

      Molina Terriza, Gabriel; Torner Sabata, Lluís; Wright, E M; Garcia Ripoll, Juan José; Perez García, Victor M. (2001-10)
      Article
      Accés restringit per política de l'editorial
      We predict that vortex dipoles nested in light beams trapped in graded-index media can undergo closed Berry trajectories, yielding periodic vortex annihilations and revivals along the light-propagation direction. The vortex ...
    • Vortex solitons in twisted circular waveguide arrays 

      Dong, Liangwei; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Ferrando, Albert (American Institute of Physics (AIP), 2022-09-13)
      Article
      Accés obert
      We address the formation of topological states in twisted circular waveguide arrays and find that twisting leads to important differences of the fundamental properties of new vortex solitons with opposite topological charges ...
    • Vortex streets in walking parametric wave mixing 

      Molina Terriza, Gabriel; Torner Sabata, Lluís; Petrov, D V (1999-07)
      Article
      Accés restringit per política de l'editorial
      The combined effects of diffraction and Poynting vector walk-off in second-harmonic generation with pump beams that contain screw phase dislocations is addressed for what is believed to be the first time. We predict the ...
    • Vortex twins and anti-twins supported by multiring gain landscapes 

      Borovkova, Olga V.; Kartashov, Yaroslav V.; Lobanov, Valery E.; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-10-01)
      Article
      Accés restringit per política de l'editorial
      We address the properties of multivortex soliton complexes supported by multiring gain landscapes in focusing Kerr nonlinear media with strong two-photon absorption. Stable complexes incorporating two, three, or four ...
    • Walk-off acceptance for quadratic soliton generation 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Torner Sabata, Lluís; Wise, F W (2001-05)
      Article
      Accés restringit per política de l'editorial
      We find the walk-off acceptance for multicolor soliton formation in second-harmonic generation schemes with single-frequency pump light. It is revealed that even though soliton families exist, outside the allowed band of ...
    • Walking light bullets 

      Mihalache, Dumitru; Mazilu, D; Malomed, B; Torner Sabata, Lluís (1999-10)
      Article
      Accés restringit per política de l'editorial
      Two-parameter families of chirped stationary two-dimensional light bullets, in the form of localized spatio-temporal solitons in dispersive-diffractive quadratically nonlinear optical media under conditions for the Type I ...
    • Walking solitons 

      Torner Sabata, Lluís; Santos Blanco, M. Concepción; Mihalache, Dumitru; Mazilu, D; Crasovan, L C (1997-12)
      Article
      Accés restringit per política de l'editorial
      By and large, optical
    • Walking solitons in quadratic nonlinear media 

      Torner Sabata, Lluís; Mazilu, D; Mihalache, Dumitru (1996-09)
      Article
      Accés restringit per política de l'editorial
      We study self-action of light in parametric wave interactions in nonlinear quadratic media. We show the existence of stationary solitons in the presence of Poynting vector beam walk-off or different group velocities between ...
    • Walking solitons in type II second-harmonic generation 

      Mihalache, Dumitru; Mazilu, D; Crasovan, L C; Torner Sabata, Lluís (1997-12)
      Article
      Accés restringit per política de l'editorial
      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. ...
    • Walking vector solitons 

      Torner Sabata, Lluís; Mihalache, Dumitru; Mazilu, D; Akhmediev, N N (1997-05)
      Article
      Accés restringit per política de l'editorial
      We investigate pulse propagation in birefringent optical fibers under conditions where both the walk-off length and the birefringence beat length between the linearly polarized modes of the fiber are comparable to the ...
    • Walking-vector-soliton caging and releasing 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-06)
      Article
      Accés restringit per política de l'editorial
      We address the formation and propagation of vector solitons in optical lattices in the presence of anisotropy-induced walk-off between ordinary and extraordinary polarized field components. Stable vector solitons trapped ...
    • Walkoff-compensated dispersion-mapped quadratic solitons 

      Torner Sabata, Lluís (1999-10)
      Article
      Accés obert
      Formation of temporal guiding-center walking solitons in tandem structures made of quadratic nonlinear crystals is investigated. The specific new effects and possibilities arising by engineering the multifrequency periodical ...
    • Wave localization at the boundary of disordered photonic lattices 

      Szameit, Alexander; Kartashov, Yaroslav V.; Zeil, P.; Dreisow, Felix; Heinrich, Matthias; Keil, R.; Nolte, Stefan; Tünnermann, A.; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-04-15)
      Article
      Accés restringit per política de l'editorial
      We report on the experimental observation of reduced light-energy transport and disorder-induced localization close to a boundary of a truncated 1D disordered photonic lattice. Our observations uncover that a higher level ...