Dipole soliton-vortices

Opt Lett. 2007 Aug 1;32(15):2155-7. doi: 10.1364/ol.32.002155.


On universal symmetry grounds, we analyze the existence of a new type of discrete-symmetry vortex solitons that can be considered as coherent states of dipole solitons carrying a nonzero topological charge. Remarkably, they can be also interpreted as excited angular Bloch states. The stability of new soliton states is elucidated numerically.