We address the properties of multivortex soliton complexes supported by multiring gain landscapes in focusing Kerr nonlinear media with strong two-photon absorption. Stable complexes incorporating two, three, or four vortices featuring opposite or identical topological charges are shown to exist. In the simplest geometries with two amplifying rings vortex twins with equal topological charges exhibit asymmetric intensity distributions, while vortex anti-twins may be symmetric or asymmetric, depending on the gain level and separation between rings.
© 2011 Optical Society of America
Original Manuscript: July 5, 2011
Revised Manuscript: August 29, 2011
Manuscript Accepted: August 30, 2011
Published: September 22, 2011
O. V. Borovkova, Y. V. Kartashov, V. E. Lobanov, V. A. Vysloukh, and L. Torner, "Vortex twins and anti-twins supported by multiring gain landscapes," Opt. Lett. 36, 3783-3785 (2011)