期刊
AIP ADVANCES
卷 6, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4968607
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB7097900, 2012CB921504]
- National Natural Science Foundation of China [11174138, 11174139, 11222442, 81127901]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- [NCET-12-0254]
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. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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