Observation of nonlinear surface waves in modulated waveguide arrays.
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We describe theoretically and study experimentally nonlinear surface waves at the edge of a modulated waveguide array with a surface defect and a self-defocusing nonlinearity. We fabricate such structures in a LiNbO(3) crystal and demonstrate the beam switching to different output waveguides with a change of the light intensity due to nonlinear coupling between the linear surface modes supported by the array.
author list (cited authors)
Qi, X., Garanovich, I. L., Xu, Z., Sukhorukov, A. A., Krolikowski, W., Mitchell, A., ... Kivshar, Y. S.