Generalized acoustic impedance metasurface
Abstract Impedance theory has become a favorite method for metasurface design as it allows perfect control of wave properties. However, its functionality is strongly limited by the condition of strict continuity of normal power flow. In this paper, it is shown that acoustic impedance theory can be g...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-01-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-024-01529-5 |
| _version_ | 1827377237662367744 |
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| author | Yu-Ze Tian Yan-Feng Wang Vincent Laude Yue-Sheng Wang |
| author_facet | Yu-Ze Tian Yan-Feng Wang Vincent Laude Yue-Sheng Wang |
| author_sort | Yu-Ze Tian |
| collection | DOAJ |
| description | Abstract Impedance theory has become a favorite method for metasurface design as it allows perfect control of wave properties. However, its functionality is strongly limited by the condition of strict continuity of normal power flow. In this paper, it is shown that acoustic impedance theory can be generalized under the integral equivalence principle without imposing the continuity of power flow. Equivalent non-local power flow transmission is instead realized through local design of metasurface unit cells that are characterized by a passive, asymmetric impedance matrix. Based on this strategy, a beam splitter loosely respecting local power flow is designed and demonstrated experimentally. It is concluded that arbitrary wave fields can be connected through arbitrarily shaped boundaries, i.e. transformed into one another. Generalized impedance metasurface theory is expected to extend the possible design of metasurfaces and the manipulation of acoustic waves. |
| first_indexed | 2024-03-08T12:37:08Z |
| format | Article |
| id | doaj.art-1ae32a2a52c94e90b0ca6bc843f672c3 |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-03-08T12:37:08Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-1ae32a2a52c94e90b0ca6bc843f672c32024-01-21T12:24:14ZengNature PortfolioCommunications Physics2399-36502024-01-01711910.1038/s42005-024-01529-5Generalized acoustic impedance metasurfaceYu-Ze Tian0Yan-Feng Wang1Vincent Laude2Yue-Sheng Wang3School of Mechanical Engineering, Tianjin UniversitySchool of Mechanical Engineering, Tianjin UniversityUniversité de Franche-Comté, CNRS, Institut FEMTO-STSchool of Mechanical Engineering, Tianjin UniversityAbstract Impedance theory has become a favorite method for metasurface design as it allows perfect control of wave properties. However, its functionality is strongly limited by the condition of strict continuity of normal power flow. In this paper, it is shown that acoustic impedance theory can be generalized under the integral equivalence principle without imposing the continuity of power flow. Equivalent non-local power flow transmission is instead realized through local design of metasurface unit cells that are characterized by a passive, asymmetric impedance matrix. Based on this strategy, a beam splitter loosely respecting local power flow is designed and demonstrated experimentally. It is concluded that arbitrary wave fields can be connected through arbitrarily shaped boundaries, i.e. transformed into one another. Generalized impedance metasurface theory is expected to extend the possible design of metasurfaces and the manipulation of acoustic waves.https://doi.org/10.1038/s42005-024-01529-5 |
| spellingShingle | Yu-Ze Tian Yan-Feng Wang Vincent Laude Yue-Sheng Wang Generalized acoustic impedance metasurface Communications Physics |
| title | Generalized acoustic impedance metasurface |
| title_full | Generalized acoustic impedance metasurface |
| title_fullStr | Generalized acoustic impedance metasurface |
| title_full_unstemmed | Generalized acoustic impedance metasurface |
| title_short | Generalized acoustic impedance metasurface |
| title_sort | generalized acoustic impedance metasurface |
| url | https://doi.org/10.1038/s42005-024-01529-5 |
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