We introduce discrete vortex solitons and vortex breathers in circular arrays of nonlinear waveguides. The simplest vortex breather in a four-waveguide coupler is a nonlinear dynamic state changing its topological charge between +1 and -1 periodically during propagation. We find the stability domain for this solution and suggest an all-optical vortex switching scheme.
|Number of pages||5|
|Journal||Physical Review A: Atomic, Molecular and Optical Physics|
|Publication status||Published - 20 Jun 2011|