Abstract
We theoretically and numerically present the design of multi-frequency acoustic metasurfaces (MFAMs) with simple structure that can work not only at fundamental frequency, but also at their harmonic frequencies, which breaks the single frequency limitation in conventional resonance-based acoustic metasurfaces. The phase matched condition for achromatic manipulation is discussed. We demonstrate achromatic extraordinary reflection and sound focusing at 1700Hz, 3400Hz, and 5100Hz, that is, they have the same reflection direction and the same focusing position. This significant feature may pave the way to new type of acoustic metasurface, and will also extend acoustic metasurface applications to strongly nonlinear source cases.
Original language | English |
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Article number | 121702 |
Journal | AIP Advances |
Volume | 6 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 1 2016 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 Author(s).
ASJC Scopus Subject Areas
- General Physics and Astronomy