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Phys Rev Lett. 2005 Jul 29;95(5):053904. Epub 2005 Jul 29.

Observation of second-band vortex solitons in 2D photonic lattices.

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Physics Department, Technion--Israel Institute of Technology, Haifa 32000, Israel.


We demonstrate second-band bright vortex-array solitons in photonic lattices. This constitutes the first experimental observation of higher-band solitons in any 2D periodic system. These solitons possess complex intensity and phase structures, yet they can be excited by a simple highly localized vortex-ring beam. Finally, we show that the linear diffraction of such beams exhibits preferential transport along the lattice axes.

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