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14 papers · 1 filter
Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays
Michal Matuszewski, Christian R. Rosberg, Dragomir N. Neshev +6
We predict a sharp crossover from nonlinear self-defocusing to discrete self-trapping of a narrow Gaussian beam with the increase of the refractive index contrast in a periodic pho…
Photonic Bloch oscillations and Zener tunneling in two-dimensional optical lattices
Henrike Trompeter, Wieslaw Krolikowski, Dragomir N. Neshev +6
We report on the first experimental observation of photonic Bloch oscillations and Zener tunneling in two-dimensional periodic systems. We study the propagation of an optical beam…
Reduced-symmetry two-dimensional solitons in photonic lattices
Robert Fischer, Denis Traeger, Dragomir N. Neshev +4
We demonstrate theoretically and experimentally a novel type of localized beams supported by the combined effects of total internal and Bragg reflection in nonlinear two-dimensiona…
Wave scattering by metamaterial wedges and interfaces
Andrey A. Sukhorukov, Ilya V. Shadrivov, Yuri S. Kivshar
We outline specific features of numerical simulations of metamaterial wedges and interfaces. We study the effect of different positioning of a grid in the Yee method, which is nece…
Soliton dynamics in deformable nonlinear lattices
Andrey A. Sukhorukov
We describe wave propagation and soliton localization in photonic lattices which are induced in a nonlinear medium by an optical interference pattern, taking into account the inher…
Beaming effect from increased-index photonic crystal waveguides
Steven K. Morrison, Yuri S. Kivshar
We study the beaming effect of light for the case of increased-index photonic crystal (PhC) waveguides, formed through the omission of low-dielectric media in the waveguide region.…