Enviaments recents

  • Spectral tunneling of lattice nonlocal solitons 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-07-09)
    Article
    Accés restringit per política de l'editorial
    We address spectral tunneling of walking spatial solitons in photorefractive media with nonlocal diffusion of the nonlinear response and an imprinted shallow optical lattice. In contrast to materials with local nonlinearities, ...
  • Stabilization of two-dimensional solitons in cubic-saturable nonlinear lattices 

    Borovkova, Olga V.; Kartashov, Yaroslav; Torner Sabata, Lluís (2010-06-04)
    Article
    Accés restringit per política de l'editorial
    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 ...
  • Dissipative defect modes in periodic structures 

    Kartashov, Yaroslav; Konotop, Vladimir V; Vysloukh, Victor A.; Torner Sabata, Lluís (2010-05-15)
    Article
    Accés restringit per política de l'editorial
    We show that periodic optical lattices imprinted in cubic nonlinear media with strong two-photon absorption and localized linear gain landscapes support stable dissipative defect modes in both focusing and defocusing media. ...
  • 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 ...
  • Twin-vortex solitons in nonlocal nonlinear media 

    Fangwei, Ye; Kartashov, Yaroslav V.; Hu, Bambi; Torner Sabata, Lluís (2010)
    Article
    Accés restringit per política de l'editorial
    We consider soliton formation in thermal nonlinear media bounded by rectangular cross sections and uncover what we believe to be a new class of nonlinear stationary topological state. Specifically, we find that stationary ...
  • Observation of two-dimensional superlattice solitons 

    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
    Accés restringit per política de l'editorial
    We observe experimentally two-dimensional solitons in superlattices comprising alternating deep and shallow waveguides fabricated via the femtosecond-laser direct writing technique. We find that the symmetry of linear ...
  • 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
    Accés restringit per política de l'editorial
    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. ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Power-dependent soliton steering in thermal nonlinear media 

    Ye, F; Kartashov, Yaroslav V.; Hu, B; Torner Sabata, Lluís (2009-08)
    Article
    Accés restringit per política de l'editorial
    We address the existence and properties of optical solitons excited in thermal nonlinear media with a transverse refractive index gradient. The interplay between the nonlocality of the thermal nonlinearity and the linear ...
  • Light bullets in Bessel optical lattices with spatially modulated nonlinearity 

    Ye, F; Kartashov, Yaroslav V.; Hu, B; Torner Sabata, Lluís (2009-07-06)
    Article
    Accés obert
    We address the stability of light bullets supported by Bessel optical lattices with out-of-phase modulation of the linear and nonlinear refractive indices. We show that spatial modulation of the nonlinearity significantly ...

Mostra'n més