Flow-induced resonance shift in sonic slit array metamaterials
A modal analysis of flow-acoustic wave propagation through slit array metamaterials is presented. It is demonstrated that the transmission-coefficient change versus flow speed is a sensitive function of frequency. Our results further confirm that transmission resonance positions and resonance widths...
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| Published in: | Physical review. B, Condensed matter and materials physics Vol. 85; no. 9 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
21-03-2012
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | A modal analysis of flow-acoustic wave propagation through slit array metamaterials is presented. It is demonstrated that the transmission-coefficient change versus flow speed is a sensitive function of frequency. Our results further confirm that transmission resonance positions and resonance widths change significantly with the flow speed. As a reverse application, the present metamaterial slit structures allow for flow tuning of slit cavity modes, design of surface bound states such as superlens applications where a broad frequency operation interval is sought. Finally, it is shown rather surprisingly that the flow-acoustic coupling is almost independent of the angle of incidence. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.1103/PhysRevB.85.094304 |