Exploració per autor "Kartashov, Yaroslav V."

Ara es mostren els items 61-80 de 178

    • Multifrequency solitons in commensurate-incommensurate photonic moiré lattices 

      Kartashov, Yaroslav V.; Ye, Fangwei; Konotop, Vladimir V.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2021-10-15)
      Article
      Accés obert
      We predict that photonic moiré patterns created by two mutually twisted periodic sublattices in quadratic nonlinear media allow the formation of parametric solitons under conditions that are strongly impacted by the geometry ...

    • Multipole surface solitons in thermal media 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
      Article
      Accés restringit per política de l'editorial
      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 ...

    • Multipole vector solitons in nonlocal nonlinear media 

      Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A.; Mihalache, Dumitru (2006-03)
      Article
      Accés restringit per política de l'editorial
      We show that multipole solitons can be made stable via vectorial coupling in bulk nonlocal nonlinear media. Such vector solitons are composed of mutually incoherent nodeless and multipole components jointly inducing a ...

    • 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
      Accés restringit per política de l'editorial
      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
      Accés restringit per política de l'editorial
      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 ...

    • Nonlinear switching of low-index defect modes in photonic lattices 

      Ye, F; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-08)
      Article
      Accés restringit per política de l'editorial
      We address nonlinear signal switching between two low-index defect channels induced in periodic optical lattices. In contrast to conventional directional couplers, where the guiding mechanism is total internal reflection ...

    • Nonlinear Tamm states in periodic photonic structures 

      Rosberg, C R; Neshev, D N; Kartashov, Yaroslav V.; Vicencio, R A; Krolikowski, W; Molina, M I; Mitchell, A; Vysloukh, Victor A.; Torner Sabata, Lluís; Kivshar, Y S (2006-12)
      Article
      Accés restringit per política de l'editorial

    • Nonlinearity-induced broadening of resonances in dynamically modulated couplers 

      Szameit, Alexander; Kartashov, Yaroslav V.; Heinrich, Matthias; Dreisow, Felix; Keil, R; Nolte, Stefan; Tunnermann, A; Vysloukh, Victor A.; Lederer, F; Torner Sabata, Lluís (2009-01)
      Article
      Accés restringit per política de l'editorial
      We report the observation of nonlinearity-induced broadening of resonances in dynamically modulated directional couplers. When the refractive index of the guiding channels in the coupler is harmonically modulated along the ...

    • Nonlinearity-induced photonic topological insulator 

      Maczewsky, Lukas J.; Heinrich, Matthias; Kremer, Mark; Ivanov, Seergey K.; Ehrhardt, Max; Martínez, Franklin; Kartashov, Yaroslav V.; Konotop, Vladimir V.; Torner Sabata, Lluís; Bauer, Dieter; Szameit, Alexander (2020-11-06)
      Article
      Accés obert
      A hallmark feature of topological insulators is robust edge transport that is impervious to scattering at defects and lattice disorder. We demonstrate a topological system, using a photonic platform, in which the existence ...

    • Nonlocal surface dipoles and vortices 

      Ye, F; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2008-03)
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      Accés restringit per política de l'editorial
      We predict the existence and address the stability of two-dimensional surface solitons featuring topologically complex shapes, including dipoles, vortices, and bound states of vortex solitons, at the interface of nonlocal ...

    • Observation of asymmetric solitons in waveguide arrays with refractive index gradient 

      Weimann, Steffen; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Szameit, Alexander; Torner Sabata, Lluís (2014-06-15)
      Article
      Accés restringit per política de l'editorial
      We study light propagation in waveguide arrays made in Kerr nonlinear media with a transverse refractive index gradient, and we find that the presence of the refractive index gradient leads to the appearance of a number ...

    • Observation of edge solitons in topological trimer arrays 

      Kartashov, Yaroslav V.; Arkhipova, Antonina; Zhuravitskii, S. A.; Skryabin, K. G.; Dyakonov, Ivan; Kalinkin, Alexander; Kulik, Sergei; Kompanets, Victor O.; Chekalin, S. V.; Torner Sabata, Lluís; Zadkov, Victor N. (American Institute of Physics (AIP), 2022-03-04)
      Article
      Accés obert
      We report the experimental observation of nonlinear light localization and edge soliton formation at the edges of fs-laser written trimer waveguide arrays, where transition from nontopological to topological phases is ...

    • Observation of higher-order solitons in defocusing waveguide arrays 

      Smirnov, E; Rüter, Ch E; Kip, D; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2007-07)
      Article
      Accés restringit per política de l'editorial
      We observe experimentally higher-order solitons in waveguide arrays with defocusing saturable nonlinearity. Such solitons can comprise several in-phase bright spots and are stable above a critical power threshold. We ...

    • Observation of linear and nonlinear light localization at the edges of moiré arrays 

      Arkhipova, Antonina; Kartashov, Yaroslav V.; Ivanov, Sergey K.; Zhuravitskii, Sergey; Skryabin, Nikolay; Dyakonov, Ivan; Kalinkin, Aleksandr; Kulik, Sergei; Kompanets, Victor O.; Chekalin, Sergey; Ye, Fangwei; Konotop, Vladimir V.; Torner Sabata, Lluís; Zadkov, Victor N. (American Institute of Physics (AIP), 2023-02-21)
      Article
      Accés obert
      We observe linear and nonlinear light localization at the edges and in the corners of truncated moiré arrays created by the superposition of periodic mutually twisted at Pythagorean angles square sublattices. Experimentally ...

    • Observation of surface solitons in chirped waveguide arrays 

      Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Heinrich, Matthias; Pertsch, T; Nolte, Stefan; Tünnermann, A; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-05)
      Article
      Accés restringit per política de l'editorial
      We report the observation of surface solitons in chirped semi-infinite waveguide arrays whose waveguides exhibit exponentially decreasing refractive indices. We show that the power threshold for surface wave formation ...

    • Observation of two-dimensional coherent surface vector lattice solitons 

      Heinrich, Matthias; Kartashov, Yaroslav V.; Szameit, Alexander; Dreisow, Felix; Keil, R; Nolte, Stefan; Tunnermann, A; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
      Article
      Accés restringit per política de l'editorial
      We report, to the best of our knowledge, the first experimental observation of vector surface solitons, which form at the edge and in the corner of two-dimensional laser-written waveguide arrays. These elliptically polarized ...

    • Observation of two-dimensional defect surface solitons 

      Szameit, Alexander; Kartashov, Yaroslav V.; Heinrich, Matthias; Dreisow, Felix; Pertsch, T; Nolte, Stefan; Tunnermann, A; Lederer, F; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-03)
      Article
      Accés restringit per política de l'editorial
      We report on the experimental observation of two-dimensional solitons located in defect channels at the surface of a hexagonal waveguide array. The threshold power for the excitation of solitons existing owing to total ...

    • Observation of two-dimensional lattice interface solitons 

      Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Heinrich, Matthias; Vysloukh, Victor A.; Pertsch, T; Nolte, Stefan; Tunnermann, A; Lederer, F; Torner Sabata, Lluís (2008-04)
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      Accés restringit per política de l'editorial
      We report on the experimental observation of two-dimensional solitons at the interface between square and hexagonal waveguide arrays. In addition to the different symmetries of the lattices, the influence of a varying ...

    • Observation of two-dimensional surface solitons in asymmetric waveguide arrays 

      Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Pertsch, T; Nolte, Stefan; Tunnermann, A; Torner Sabata, Lluís (2007-04)
      Article
      Accés restringit per política de l'editorial
      We report on the experimental observation of two-dimensional surface waves localized at the edge or in the corner of femtosecond laser-written waveguide arrays in fused silica. Increasing the power of the input beam allows ...

    • Optical soliton formation controlled by angle twisting in photonic moiré lattices 

      Fu, Qidong; Wang, Peng; Huang, Changming; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Konotop, Vladimir; Ye, Fangwei (Springer-Nature, 2020-08-24)
      Article
      Accés obert
      Exploration of the impact of synthetic material landscapes featuring tunable geometrical properties on physical processes is a research direction that is currently of great interest because of the outstanding phenomena ...