Experiments on Linear and Nonlinear Localization of Optical Vortices in Optically Induced Photonic Lattices
Figure 4
Experimental observation of an extended gap vortex soliton in photonic lattices with self-defocusing nonlinearity. (a) lattice beam, where the circle shows the location of the input vortex, (b) the interferogram of the input vortex with a tilted plane wave to show the phase singularity, (c) self-trapped vortex pattern, (d) the zoom-in interferogram of (c) with a tilted plane wave, and (e) the Fourier-space spectrum of the vortex soliton. The circles in (b) and (d) show the position of the phase singularity.
