Stable counter-rotating vortex pairs in saturable media

  title={Stable counter-rotating vortex pairs in saturable media},
  author={Anton S. Desyatnikov and Dumitru Mihalache and Dumitru Mazilu and Boris A. Malomed and F. A. Lederer},
We resolve a controversial issue of the stability of composite vortex solitons in self-focusing saturable nonlinear media. Stable vortex solitons with hidden angular momentum, i.e., composed of counter-rotating beams with topological charges +1 and −1, are found, and their linear-stability region is identified. In contrast, the solitons with explicit vorticity are always unstable against splitting. The predicted linear stability of the hiddenvorticity solitons is achieved in the strong… CONTINUE READING