We study self-localized second-band vortex states in two-dimensional photonic lattices and find stable ring solitons whose phase forms an array of counterrotating vortices. We also identify composite solitons in which a second-band vortex is jointly trapped with a mode arising from the first band and study their stability. When such a composite entity is unstable, it disintegrates while exchanging angular momentum between its constituents, eventually stabilizing into another form of composite soliton.
© 2004 Optical Society of America
Ofer Manela, Oren Cohen, Guy Bartal, Jason W. Fleischer, and Mordechai Segev, "Two-dimensional higher-band vortex lattice solitons," Opt. Lett. 29, 2049-2051 (2004)