We report what is believed to be the first observation of self-trapping and charge-flipping of double-charged optical vortices in two-dimensional photonic lattices. Both on- and off-site excitations lead to the formation of rotating quasi-vortex solitons, reversing the topological charges and the direction of rotation through a quadrupolelike transition state. Experimental results are corroborated with numerical simulations.
© 2006 Optical Society of America
Original Manuscript: April 21, 2006
Manuscript Accepted: May 18, 2006
Published: July 25, 2006
Anna Bezryadina, Eugenia Eugenieva, and Zhigang Chen, "Self-trapping and flipping of double-charged vortices in optically induced photonic lattices," Opt. Lett. 31, 2456-2458 (2006)