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Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays

Michal Matuszewski·Christian R. Rosberg·Dragomir N. Neshev·Andrey A. Sukhorukov·Arnan Mitchell·Marek Trippenbach·Michael W. Austin·Wieslaw Krolikowski·Yuri S. Kivshar
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Abstract

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 photonic lattice. We demonstrate experimentally nonlinear discrete localization of light with defocusing nonlinearity by single site excitation in LiNbO$_3$ waveguide arrays.

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Michal Matuszewski, Christian R. Rosberg, Dragomir N. Neshev, Andrey A. Sukhorukov, Arnan Mitchell, Marek Trippenbach, Michael W. Austin, Wieslaw Krolikowski, Yuri S. Kivshar. 2005-11-25. Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays. https://doi.org/10.1364/opex.14.000254

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