Nonlinear Tamm States in Periodic Photonic Structures
The self action of a narrow laser beam propagating near the edge of a lithium niobate waveguide array with defocusing nonlinearity and a semi-infinite periodic refractive index modulation in the transverse direction was investigated. The formation of surface gap solitons or nonlinear Tamm states was observed. The self-trapping of light was observed in the nonlinear regime above a certain threshold power when the propagation constant was shifted into the gap of the photonic transmission...[Show more]
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