Discrete vortex solitons and parity time symmetry

Daniel Leykam; Vladimir V. Konotop; Anton S. Desyatnikov

doi:10.1364/OL.38.000371

Discrete vortex solitons and parity time symmetry

Daniel Leykam^*, Vladimir V. Konotop, Anton S. Desyatnikov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

We study the effect of lifting the degeneracy of vortex modes with a parity time (PT) symmetric defect, using discrete vortices in a circular array of nonlinear waveguides as an example. When the defect is introduced, the degenerate linear vortex modes spontaneously break PT symmetry and acquire complex eigenvalues, but nonlinear propagating modes with real propagation constants can still exist. The stability of nonlinear modes depends on both the magnitude and the sign of the vortex charge; thus PT symmetric systems offer new mechanisms to control discrete vortices.

Original language	English
Pages (from-to)	371-373
Number of pages	3
Journal	Optics Letters
Volume	38
Issue number	3
DOIs	https://doi.org/10.1364/OL.38.000371
Publication status	Published - 1 Jan 2013

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Discrete vortex solitons and parity time symmetry

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