Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices

Details Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices

2009-11-20

arxiv.org/abs/0911.4029v1

Physical Review A 80, 063832 (2009)

Physics

Optics

16 pages, 5 figures, to appear in Physical Review A

Scientific paper

We report on the experimental observation of two-dimensional surface solitons residing at the interface between a homogeneous square lattice and a superlattice that consists of alternating "deep" and "shallow" waveguides. By exciting single waveguides in the first row of the superlattice, we show that solitons centered on deep sites require much lower powers than their respective counterparts centered on shallow sites. Despite the fact that the average refractive index of the superlattice waveguides is equal to the refractive index of the homogeneous lattice, the interface results in clearly asymmetric output patterns.

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