Observation of surface gap solitons in semi-infinite waveguide arrays

Details Observation of surface gap solitons in semi-infinite waveguide arrays Observation of surface gap solitons in semi-infinite waveguide arrays

2006-03-24

arxiv.org/abs/physics/0603202v1

Physics

Optics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.083901

We report on the first observation of surface gap solitons, recently predicted to exist at the interface between uniform and periodic dielectric media with defocusing nonlinearity [Ya.V. Kartashov et al., Phys. Rev. Lett. 96, 073901 (2006). We demonstrate strong self-trapping at the edge of a LiNbO_3 waveguide array and the formation of staggered surface solitons with propagation constant inside the first photonic band gap. We study the crossover between linear repulsion and nonlinear attraction at the surface, revealing the mechanism of nonlinearity-mediated stabilization of the surface gap modes.

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