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Observation of non-contractible loop states in a photonic Kagome lattice of Corbino-geometry

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Abstract

We demonstrate robust-boundary-mode (RBM) and non-contractible loop state (NLS) in a photonic Kagome lattice, manifesting unique topological entities in flatband systems. We achieve direct observation of the NLS along toroidal direction in a Corbino- geometry.

© 2020 The Author(s)

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