Observation of optical azimuthons.
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We observe experimentally optical azimuthons, a generic class of ring-shaped localised spiralling beams with azimuthal modulation, carrying phase dislocation in self-focusing nonlinear media. We observe three- and four-lobe azimuthons in 87Rb vapours and demonstrate their anomalous rotation controlled by the input phase distribution.
complete list of authors
Minovich, Alexander||Neshev, Dragomir N||Desyatnikov, Anton S||Krolikowski, Wieslaw||Kivshar, Yuri S