journal article·2016-12-01Open access

Multi-frequency acoustic metasurface for extraordinary reflection and sound focusing

Yi-Fan Zhu, Xu-Dong Fan, Bin Liang, Jing Yang, Jun Yang, Lei-lei Yin, Jian-Chun Cheng

AIP Advances· Volume 6· Issue 12

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.
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Research context

OpenAlex topics: Acoustic Wave Phenomena Research · Metamaterials and Metasurfaces Applications · Aerodynamics and Acoustics in Jet Flows

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Affiliations

Nanjing University 1 Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, , Nanjing 210093, People’s Republic of China

Chinese Academy of Sciences 2 Key Laboratory of Noise and Vibration Research, Institute of Acoustics, , Beijing 100190, People’s Republic of China

University of Illinois at Urban-Champaign 3 Imaging Technology Group, Beckman Institute, , Urbana, Illinois 61801, USA

Funding

National Natural Science Foundation of China · Program for New Century Excellent Talents in University

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