Observation of two-dimensional surface solitons.

@article{Wang2007ObservationOT,
  title={Observation of two-dimensional surface solitons.},
  author={Xiaosheng Wang and Anna Bezryadina and Zhigang Chen and Konstantinos G. Makris and Demetrios N Christodoulides and George I. Stegeman},
  journal={Physical review letters},
  year={2007},
  volume={98 12},
  pages={123903}
}
We report the first experimental observation of two-dimensional surface solitons at the boundaries (edges or corners) of a finite optically induced photonic lattice. Both in-phase and gap nonlinear surface self-trapped states were observed under single-site excitation conditions. Our experimental results are in good agreement with theoretical predictions. 
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