Browsing by Author "Szameit, Alexander"
Now showing items 1-20 of 22
-
Anderson cross-localization
Stützer, Simon; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Tünnermann, A.; Nolte, Stefan; Lewenstein, Maciej; Torner Sabata, Lluís; Szameit, Alexander (2012)
Article
Restricted access - publisher's policyWe report Anderson localization in two-dimensional optical waveguide arrays with disorder in waveguide separation introduced along one axis of the array, in an uncorrelated fashion for each waveguide row. We show that the ... -
Angular surface slitons in sectorial hexagonal arrays
Szameit, Alexander; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Heinrich, Matthias; Dreisow, Felix; Pertsch, T; Nolte, Stefan; Tünnermann, A; Lederer, F; Torner Sabata, Lluís (2008-07)
Article
Restricted access - publisher's policyWe report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. The face angle between these interfaces has ... -
Evolution dynamics of discrete-continuous light bullets
Eilenberger, F.; Minardi, Stefano; Szameit, Alexander; Roepke, Ulrich; Kobelke, J.; Schuster, K.; Bartelt, H.; Nolte, Stefan; Torner Sabata, Lluís; LEDERER, FALK; Tünnermann, Andreas; Pertsch, T. (2011-07-29)
Article
Restricted access - publisher's policyWe experimentally and numerically investigate the propagation of light bullets (LBs) excited in two-dimensional fiber arrays. The combination of nonlinear self-frequency shift, wavelength dependence of thedispersion, and ... -
Floquet edge multicolor solitons
Ivanov, Seergey K.; Kartashov, Yaroslav V.; Szameit, Alexander; Torner Sabata, Lluís; Konotop, Vladimir V. (John Wiley & sons, 2022-03)
Article
Open AccessTopological insulators are unique physical structures that are insulators in their bulk, but support currents at their edges which can be unidirectional and topologically protected from scattering on disorder and ... -
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
Restricted access - publisher's policyWe 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
Restricted access - publisher's policyWe 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 ... -
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
Restricted access - publisher's policyWe 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 ... -
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
Restricted access - publisher's policyWe 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
Open AccessA 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 ... -
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
Restricted access - publisher's policyWe 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 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
Restricted access - publisher's policyWe 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
Restricted access - publisher's policyWe 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
Restricted access - publisher's policyWe 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)
Article
Restricted access - publisher's policyWe 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 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
Restricted access - publisher's policyWe 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 ... -
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
Restricted access - publisher's policyWe 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 ... -
Soliton excitation in waveguide arrays with an effective intermediate dimensionality
Szameit, Alexander; Kartashov, Yaroslav V.; Dreisow, Felix; Heinrich, Matthias; Pertsch, T; Nolte, Stefan; Tunnermann, A F Lederer; Vysloukh, Victor A.; Lederer, F.; Torner Sabata, Lluís (2009-01)
Article
Restricted access - publisher's policyWe reveal and observe experimentally significant modifications undertaken by discrete solitons in waveguide lattices upon the continuous transformation of the lattice structure from one-dimensional to two-dimensional. Light ... -
Surface solitons at interfaces of arrays with spatially modulated nonlinearity
Kartashov, Yaroslav V.; Vysloukh, Victor A.; Szameit, Alexander; Dreisow, Felix; Heinrich, Matthias; Nolte, Stefan; Tünnermann, A; Pertsch, T; Torner Sabata, Lluís (2008-05)
Article
Restricted access - publisher's policyWe address the properties of two-dimensional surface solitons supported by the interface of a waveguide array whose nonlinearity is periodically modulated. When the nonlinearity strength reaches its minima at the points ... -
Three-dimensional light bullets in arrays of waveguides
Minardi, Stefano; Eilenberger, F.; Kartashov, Yaroslav V.; Szameit, Alexander; Röpke, U.; Kobelke, J.; Schuster, K.; Bartelt, H.; Nolte, Stefan; Torner Sabata, Lluís; LEDERER, FALK; Tünnermann, A.; Pertsch, T. (2010-12-20)
Article
Restricted access - publisher's policyWe report the first experimental observation of three-dimensional light bullets, excited by femtosecond pulses in a system featuring quasi-instantaneous cubic nonlinearity and a periodic, transversally modulated refractive ... -
Topological dipole Floquet solitons
Ivanov, Seergey K.; Kartashov, Yaroslav V.; Heinrich, Matthias; Szameit, Alexander; Torner Sabata, Lluís; Konotop, Vladimir V. (American Physical Society, 2021-05-11)
Article
Open AccessWe theoretically introduce a type of topological dipole soliton propagating in a Floquet topological insulator based on a kagome array of helical waveguides. Such solitons bifurcate from two edge states belonging to different ...