paper

Observation of a localized flat-band state in a photonic Lieb lattice

arXiv:1412.6342 · doi:10.1103/PhysRevLett.114.245504

Abstract

We show experimentally how a non-diffracting state can be excited in a photonic Lieb lattice. This lattice supports three energy bands, including a perfectly flat middle band, which corresponds to an infinite effective mass with zero dispersion. We show that a suitable optical input state can be prepared so as to only excite the flat band. We analyse, both experimentally and theoretically, the evolution of such photonic flat-band states, and show their remarkable robustness, even in the presence of disorder.

Accepted for publication in Physical Review Letters

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Observation of a localized flat-band state in a photonic Lieb lattice · wovepaper