Nonlocal surface dipoles and vortices

Details Nonlocal surface dipoles and vortices Nonlocal surface dipoles and vortices

2008-02-18

arxiv.org/abs/0802.2521v1

Phys. Rev. A 77, 033829 (2008)

Nonlinear Sciences

Pattern Formation and Solitons

20 pages, 5 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.77.033829

We predict the existence and address the stability of two-dimensional surface solitons featuring topologically complex shapes, including dipoles, vortices, and bound states of vortex solitons, at the interface of nonlocal thermal media. Unlike their counterparts in bulk media, surface dipoles are found to be stable in the entire existence domain. Surface vortices are found to exhibit strongly asymmetric intensity and phase distributions, and are shown to be stable, too. Bound states of surface vortex solitons belong to a novel class of surface solitons having no counterparts in bulk media. Such states are found to be stable provided that their energy flow does not exceed an upper threshold. Our findings constitute the first known example of topologically complex solitons located at nonlocal two-dimensional interfaces.

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