ID | 66995 |
フルテキストURL | |
著者 |
Ali, Md. Shuzon
Department of Electrical and Electronic Engineering, Okayama University
Kataoka, Motoki
Department of Electrical and Electronic Engineering, Okayama University
Misawa, Masaaki
Department of Electrical and Electronic Engineering, Okayama University
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Tsuruta, Kenji
Department of Electrical and Electronic Engineering, Okayama University
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抄録 | We proposed a reconfigurable valley topological acoustic waveguide constructed using a 2D phononic crystal (PnC) with C3v symmetric arrangement of three rods in the unit cell. An interface between two types of PnCs with differently oriented unit cells exhibits high robustness of the valley transport of acoustic waves via the topologically protected state. Structural reconfiguration was introduced by the continuous translation of rod arrays in the PnCs. The topological phase transition in this translational change was quantitatively identified by the change in the Berry curvature. The translation of the rods leaves a dimer array at the interface, creating a localized/defective mode along the waveguide. Despite the presence of the localized mode, the acoustic wave can propagate along the reconfigurable waveguide the same as the original waveguide. The continuous translation of a rod array can be used to turn on and off the bandgap. This can be a new approach to design a robust acoustic device with a high reconfigurability.
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発行日 | 2023-01-25
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出版物タイトル |
Japanese Journal of Applied Physics
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巻 | 62巻
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号 | SJ号
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出版者 | IOP Publishing
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開始ページ | SJ1002
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ISSN | 0021-4922
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © 2023 The Author(s).
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論文のバージョン | publisher
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DOI | |
Web of Science KeyUT | |
関連URL | isVersionOf https://doi.org/10.35848/1347-4065/acae63
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ライセンス | http://creativecommons.org/licenses/by/4.0
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Citation | Md. Shuzon Ali et al 2023 Jpn. J. Appl. Phys. 62 SJ1002
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助成機関名 |
Japan Society for the Promotion of Science
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助成番号 | JP21H05020
JP21K18877
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