Elliptic Vortices in Composite Mathieu Lattices

Details Elliptic Vortices in Composite Mathieu Lattices Elliptic Vortices in Composite Mathieu Lattices

2009-05-02

arxiv.org/abs/0905.0186v1

Nonlinear Sciences

Pattern Formation and Solitons

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

Scientific paper

We address the elliptically shaped vortex solitons in defocusing nonlinear media imprinted with a composite Mathieu lattice. Elliptic vortices feature anisotropic patterns both in intensity and phase, and can only exist when their energy flow exceed some certain threshold. Single-charged elliptic vortices are found to arise via bifurcation from dipole modes, which, to the best of our knowledge is the first example in the context of optics studies of symmetry breaking bifurcations for the phase dislocations of different dimensionalities. Higher-order elliptic vortices with topological charge could exhibit spatially separated single-charged phase singularities, leading to their stabilization. The salient features of reported elliptic vortices qualitatively hold for other elliptic shaped confining potentials.

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