Now showing items 41-60 of 162

  • Hybrid bloch-anderson localization of light 

    Stützer, Simon; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Konotop, Vladimir V; Nolte, Stefan; Torner Sabata, Lluís; Szameit, Alexander (2013-04-26)
    Article
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    We investigate the interplay of Bloch oscillations and Anderson localization in optics. Gradual washing out of Bloch oscillations and the formation of nearly stationary averaged intensity distributions, which are symmetric ...
  • Inhibition of light tunneling in waveguide arrays 

    Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Heinrich, Matthias; Pertsch, T; Nolte, Stefan; Tunnermann, A; Vysloukh, Victor A.; Lederer, F; Torner Sabata, Lluís (2009-04)
    Article
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    We report the observation of almost perfect light tunneling inhibition at the edge and inside laser-written waveguide arrays due to band collapse. When the refractive index of the guiding channels is harmonically modulated ...
  • Inhibition of tunneling and edge state control in polariton topological insulators 

    Zhang, Yiqi; Kartashov, Yaroslav V.; Zhang, Yanpeng; Torner Sabata, Lluís; Skryabin, Dmitry V. (2018-12-01)
    Article
    Open Access
    We address the inhibition of tunneling in polariton condensates confined in a potential landscape created by a honeycomb array of microcavity pillars in the presence of spin- orbit coupling and Zeeman splitting in the ...
  • Lattice-supported surface waves in nonlocal nonlinear media 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2006-08)
    Article
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    We reveal that lattice interfaces imprinted in nonlocal nonlinear media support surface solitons that do not exist in other similar settings, including interfaces of local and nonlocal uniform materials. We show the impact ...
  • Lieb polariton topological insulators 

    Li, Chunyan; Ye, Fangwei; Chen, Xianfeng; Kartashov, Yaroslav V.; Ferrando, Albert; Torner Sabata, Lluís; Skryabin, Dmitry V. (American Physical Society, 2018-02-12)
    Article
    Open Access
    We predict that the interplay between the spin-orbit coupling, stemming from the transverse electric–transverse magnetic energy splitting, and the Zeeman effect in semiconductor microcavities supporting exciton-polariton ...
  • Light bullets in Bessel optical lattices with spatially modulated nonlinearity 

    Ye, F; Kartashov, Yaroslav V.; Hu, B; Torner Sabata, Lluís (2009-07-06)
    Article
    Open Access
    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 ...
  • Light bullets in optical tandems 

    Torner Sabata, Lluís; Kartashov, Yaroslav V. (2009-04)
    Article
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    We address the concept of three-dimensional light bullet formation in structures where nonlinearity and dispersion are contributed by different materials, including metamaterials, which are used at their best to create ...
  • Light dynamics in materials with radially inhomogeneous thermal conductivity 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2013-11-01)
    Article
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    We study the properties of bright and vortex solitons in thermal media with nonuniform thermal conductivity and homogeneous refractive index, whereby the local modulation of the thermal conductivity strongly affects the ...
  • Light tunneling inhibition and anisotropic diffraction engineering in two-dimensional waveguide arrays 

    Kartashov, Yaroslav V.; Szameit, Alexander; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
    Article
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    We address two-dimensional (2D) waveguide arrays where light tunneling into neighboring waveguides may be effectively suppressed by an out-of-phase harmonic modulation of the refractive index in neighboring waveguides at ...
  • Localization-delocalization wavepacket transition in Pythagorean aperiodic potentials 

    Huang, Changming; Ye, Fangwei; Chen, Xianfeng; Kartashov, Yaroslav V.; Konotop, Vladimir V.; Torner, Lluis (Nature, 2016-09-02)
    Article
    Open Access
    We introduce a composite optical lattice created by two mutually rotated square patterns and allowing observation of continuous transformation between incommensurate and completely periodic structures upon variation of ...
  • Localization-delocalization wavepacket transition in Pythagorean aperiodic potentials 

    Huang, Changming; Ye, Fangwei; Chen, Xianfeng; Kartashov, Yaroslav V.; Konotop, Vladimir V; Torner Sabata, Lluís (Macmillan Publishers, 2016-09-02)
    Article
    Open Access
    We introduce a composite optical lattice created by two mutually rotated square patterns and allowing observation of continuous transformation between incommensurate and completely periodic structures upon variation of the ...
  • Matter-wave soliton control in optical lattices with topological dislocations 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís (2006-10)
    Article
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    We address the concept of guiding and transporting matter-wave solitons along the channels of optical lattices made by interference patterns of beams containing topological wavefront dislocations. The local lattice distortions ...
  • Metastability of dark snoidal-type waves in quadrayic nonlinear media 

    Kartashov, Yaroslav V.; Egorov, A A; Zelenina, A S; Vysloukh, Victor A.; Torner Sabata, Lluís (2003-11)
    Article
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    We report the existence and basic properties of dark snoidal-type waves self-sustained in quadratic nonlinear media. Using a stability analysis technique, we reveal that they are almost completely stable, or metastable, ...
  • Metastability of quantum droplet clusters 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2019-05-14)
    Article
    Open Access
    We show that metastable ring-shaped clusters can be constructed from two-dimensional quantum droplets in systems described by the Gross-Pitaevskii equations augmented with Lee-Huang-Yang quantum corrections. The clusters ...
  • Multicolor lattice solitons 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A. (2004-05)
    Article
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    We report on the existence of multicolor solitons supported by periodic lattices made from quadratic nonlinear media. Such lattice solitons bridge the gap between continuous solitons in uniform media and discrete solitons ...
  • Multicolor soliton culsters 

    Kartashov, Yaroslav V.; Molina Terriza, Gabriel; Torner Sabata, Lluís (2002-11)
    Article
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    We present a comprehensive theoretical investigation of the formation and propagation of multicolor ringlike soliton clusters in quadratic nonlinear materials under conditions for type I second-harmonic generation. We show ...
  • Multicolor vortex solitons in two-dimensional photonic lattices 

    Xu, Zhiyong; Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2005-01)
    Article
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    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 ...
  • Multipole-mode solitons in Bessel optical lattices 

    Kartashov, Yaroslav V.; Carretero Gonzalez, R; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2005-12)
    Article
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    We study basic properties of quiescent and rotating multipole-mode solitons supported by axially symmetric Bessel lattices in a medium with defocusing cubic nonlinearity. The solitons can be found in different rings of the ...
  • Multipole-mode surface solitons 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís (2006-06)
    Article
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    We discover multipole-mode solitons supported by the surface between two distinct periodic lattices imprinted in Kerr-type nonlinear media. Such solitons are possible because the refractive index modulation at both sides ...
  • Multipole surface solitons in thermal media 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
    Article
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    We address the existence and properties of multipole solitons localized at a thermally insulating interface between uniform or layered thermal media and a linear dielectric. We find that in the case of uniform media, only ...