Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays.
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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.
Matuszewski, M., Rosberg, C. R., Neshev, D. N., Sukhorukov, A. A., Mitchell, A., Trippenbach, M., ... Kivshar, Y. S.
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Matuszewski, Michal||Rosberg, Christian R||Neshev, Dragomir N||Sukhorukov, Andrey A||Mitchell, Arnan||Trippenbach, Marek||Austin, Michael W||Krolikowski, Wieslaw||Kivshar, Yuri S