Journal
APPLIED PHYSICS LETTERS
Volume 110, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4978689
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Funding
- National Natural Science Foundation of China [61625502, 61574127, 61601408]
- ZJNSF [LY17F010008]
- Postdoctoral Science Foundation of China [2015M581930]
- Top-Notch Young Talents Program of China
- Innovation Joint Research Center for Cyber-Physical-Society System
- MIT Sea Grant College Program, under NOAA Grant [NA10OAR4170086]
- MIT Sea Grant College Program, under MIT SG Project [2015-R/RCM-41]
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We propose a method to design bifunctional acoustic lens using acoustic metamaterials that possess separate functions at different directions. The proposed bifunctional acoustic lens can be implemented in practice with subwavelength unit cells exhibiting effective anisotropic parameters. With this methodology, we experimentally demonstrate an acoustic Luneburg-fisheye lens at operational frequencies from 6300 Hz to 7300 Hz. Additionally, a bifunctional acoustic square lens is proposed with different focal lengths for multi directions. This method paves the way to manipulating acoustic energy flows with functional lenses. Published by AIP Publishing.
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