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Metasurfaces: Near‐Field Characterization of Higher‐Order Topological Photonic States at Optical Frequencies (Adv. Mater. 18/2021)
Author(s) -
Vakulenko Anton,
Kiriushechkina Svetlana,
Wang Mingsong,
Li Mengyao,
Zhirihin Dmitry,
Ni Xiang,
Guddala Sriram,
Korobkin Dmitry,
Alù Andrea,
Khanikaev Alexander B.
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202170135
Subject(s) - topology (electrical circuits) , polarization (electrochemistry) , photonics , torus , dipole , field (mathematics) , physics , materials science , optics , quantum mechanics , geometry , chemistry , mathematics , combinatorics , pure mathematics
In article number 2004376 Andrea Alù, Alexander B. Khanikaev, and co‐workers apply a near‐field technique to investigate a higher‐order topological photonic metasurface. They show that the near‐field profiles reveal the topological nature of the optical modes (depicted as a torus). Topology manifests in the displacement of the Wannier center, giving rise to the topological dipole polarization and emergence of the topological boundary states observed in the optical near‐field.