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Observation of Photonic Orbital Corner States in Higher-order Topological Insulators

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Abstract

We demonstrate orbital corner states in photonic higher-order topological insulators (HOTIs), comparing the p-band characteristics between two-dimensional Su-Schrieffer-Heeger (SSH) and breathing Kagome lattices. The orbital corner excitations are explored in topological nontrivial and trivial regimes.

© 2022 The Author(s)

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