Journal
PHYSICAL REVIEW A
Volume 83, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.063825
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Funding
- High Council for Scientific and Technological Cooperation between France and Israel
- Region Pays de Loire, France
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By means of a systematic numerical analysis, we demonstrate that hexagonal lattices of parallel linearly coupled waveguides, with the intrinsic cubic self-focusing nonlinearity, give rise to three species of stable semidiscrete complexes (which are continuous in the longitudinal direction) with embedded vorticity S: triangular modes with S = 1, hexagonal ones with S = 2, both centered around an empty central core, and compact triangles with S = 1, which do not not include the empty site. Collisions between stable triangular vortices are studied too. These waveguiding lattices can be realized in optics and Bose-Einstein condensate.
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