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

Domenico Bongiovanni,Zhichan Hu,Yahui Zhang,Ziteng Wang,Xiangdong Wang,Dario Jukić,Yi Hu,Daohong Song,Roberto Morandotti,Hrvoje Buljan,Zhigang Chen

Optica Advanced Photonics Congress 2022（2022）

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摘要

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.

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关键词

photonic orbital corner states,higher-order

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