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

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arxiv 1412.6342 v3 pith:GBA6UYIF submitted 2014-12-19 physics.optics cond-mat.quant-gas

Sebabrata Mukherjee , Alexander Spracklen , Debaditya Choudhury , Nathan Goldman , Patrik Öhberg , Erika Andersson , Robert R. Thomson This is my paper · ORCID
classification physics.opticscond-mat.quant-gas
keywords latticephotonicstatebandexperimentallyflatflat-bandlieb
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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.

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  1. Quantum Metric Bound State of Light

    cond-mat.mes-hall 2026-06 unverdicted novelty 7.0 of 10

    Defect-induced bound states in flat bands have exponential decay length lower-bounded by the quantum metric when kinetic energy and CLS protection are absent.

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