Y. Plotnik, M. Rechtsman, D. Song, M. Heinrich, A. Szameit, N. Malkova, Zhigang Chen, M. Segev
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Observation of dispersion-free edge states in honeycomb photonic lattices
We present the observation of dispersion-free edge states in a honeycomb lattice. We show the existence of surface states on both zigzag and bearded edges, and display their dispersion-free nature by tilting the input beam.