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.
© 2007 Optical Society of America
Original Manuscript: April 16, 2007
Revised Manuscript: April 16, 2007
Manuscript Accepted: May 21, 2007
Published: July 23, 2007
Yaroslav V. Kartashov, Albert Ferrando, and Miguel-Ángel García-March, "Dipole soliton-vortices," Opt. Lett. 32, 2155-2157 (2007)