Now showing items 21-28 of 28

    • Stabilization of multibeam necklace solitons in circular arrays with spatially modulated nonlinearity 

      Kartashov, Yaroslav; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-11)
      Article
      Restricted access - publisher's policy
      We consider necklace solitons supported by circular waveguide arrays with out-of-phase modulation of nonlinearity and linear refractive index. Such two-dimensional necklace solitons appear as rings of multiple out-of-phase ...
    • Stabilization of two-dimensional solitons in cubic-saturable nonlinear lattices 

      Borovkova, Olga V.; Kartashov, Yaroslav; Torner Sabata, Lluís (2010-06-04)
      Article
      Restricted access - publisher's policy
      We consider soliton dynamics and stability in a nonlinear lattice formed by alternating domains with focusing cubic and saturable nonlinearities. We find that in such lattices, solitons centered on cubic domains may be ...
    • Stable vortex-soliton tori with multiple nested phase singularities in dissipative media 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav; Torner Sabata, Lluís (2012)
      Article
      Restricted access - publisher's policy
      We show the existence of stable two- and three-dimensional vortex solitons carrying multiple, spatially separated, single-charge topological dislocations nested in a common vortex-ring core. Such nonlinear states are ...
    • Stripe-like quasi-nondiffracting optical lattices 

      Kartashov, Yaroslav; López Aguayo, Servando; Vysloukh, Victor A.; Torner Sabata, Lluís (2011-05-09)
      Article
      Restricted access - publisher's policy
      We introduce stripe-like quasi-nondiffracting lattices that can be generated via spatial spectrum engineering. The complexity of the spatial shapes of such lattices and the distance of their almost diffractionless propagation ...
    • Three-dimensional hybrid vortex solitons 

      Driben, Rodislav; Kartashov, Yaroslav; Malomed, Boris A.; Meier, Torsten; Torner Sabata, Lluís (2014-06-16)
      Article
      Open Access
      We show, by means of numerical and analytical methods, that media with a repulsive nonlinearity which grows from the center to the periphery support a remarkable variety of previously unknown complex stationary and dynamical ...
    • Topological light bullets supported by spatiotemporal gain 

      Lobanov, Valery E.; Borovkova, Olga V.; Kartashov, Yaroslav; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-02-02)
      Article
      Restricted access - publisher's policy
      We reveal that the competition among diffraction, cubic nonlinearity, two-photon absorption, and gain localized in both space and time results in arrest of collapse, suppression of azimuthal modulation instabilities for ...
    • Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices 

      Heinrich, Matthias; Kartashov, Yaroslav; Ramírez, L. P. R.; Szameit, Alexander; Dreisow, Felix; Keil, R; Nolte, Stefan; Tünnermann, Andreas; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-12)
      Article
      Restricted access - publisher's policy
      We report on the experimental observation of two-dimensional surface solitons residing at the interface between a homogeneous square lattice and a superlattice that consists of alternating “deep” and “shallow” waveguides. ...
    • Unbreakable PT symmetry of solitons supported by inhomogeneous defocusing nonlinearity 

      Kartashov, Yaroslav; Malomed, Boris A.; Torner Sabata, Lluís (OSA, 2014-09-24)
      Article
      Open Access