Abstract

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

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