Self-trapping of optical vortices in waveguide lattices with a self-defocusing nonlinearity

Daohong Song, Cibo Lou, Liqin Tang, Xiaosheng Wang, Wei Li, Xingyu Chen, Kody J.H. Law, Hadi Susanto, P. G. Kevrekidis, Jingjun Xu, Zhigang Chen

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


We demonstrate the self-trapping of single- and double-charged optical vortices in waveguide lattices induced with a self-defocusing nonlinearity. Under appropriate conditions, a donut-shaped single-charged vortex evolves into a stable discrete gap vortex soliton, but a doublecharged vortex turns into a self-trapped quadrupole-like structure. Spectrum measurement and numerical analysis suggest that the gap vortex soliton does not bifurcate from the edge of the Bloch band, quite different from previously observed gap spatial solitons. Our numerical findings are in good agreement with experimental observations.

Original languageBritish English
Pages (from-to)10110-10116
Number of pages7
JournalOptics Express
Issue number14
StatePublished - 7 Jul 2008


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