FIG. 8.8 The same as in Fig. 8.6 , but in the case of the experiment with the input vorticity S = 1, launched into the PhR medium with the self-defocusing sign of the saturable nonlinearity. Unlike the case of the self-focusing nonlinearity, the vortex soliton with S = 1 is stable here ( Terhalle et al., 2009 ). More about this image found in The same as in Fig. 8.6 , but in the case of the experiment with the input...

FIG. 8.11 The intensity and phase distribution (left and right panels, respectively) of the stable ring-shaped chain of alternating vortex and antivortex solitons, produced by the numerical solution of the model of the PhR medium with the self-attractive saturable nonlinearity and embedded hexagonal photonic lattice. This prediction is similar to the experimentally observed state displayed in Fig. 8.10 ( Terhalle et al., 2008) . More about this image found in The intensity and phase distribution (left and right panels, respectively) ...

FIG. 4.5 Experimentally observed robust soliton-like rotating (2+1)D patterns in the form of “propellers” composed of two (a) or three (b) “blades” (individual ones are identified by means of white dots). They were created in the photorefractive crystal, which features the saturable self-focusing nonlinearity. The white arrows indicate the direction of the rotation in the transverse plane ( Zhang et al., 2010 ). More about this image found in Experimentally observed robust soliton-like rotating (2+1)D patterns in the...