Bifunctional acoustic metamaterial lens designed with coordinate transformation
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Bifunctionalacousticmetamateriallensdesignedwithcoordinatetransformation.pdf
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Author(s)
Zhu, Rongrong
Zheng, Bin
Musa, Muhyiddeen Yahya
Jing, Liqiao
Yang, Yihao
Wang, Huaping
Dehdashti, Shahram
Chen, Hongsheng
Ma, Chu
Fang, Xuanlai
Date Issued
March 2017
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Zhu, Rongrong, et al. “Bifunctional Acoustic Metamaterial Lens Designed with Coordinate Transformation.” Applied Physics Letters, vol. 110, no. 11, Mar. 2017, p. 113503. © 2017 Authors
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4978689
