Numerical Study of a near-Zero-Index Acoustic Metamaterial
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near_zero_index.pdf
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Author(s)
Jing, Yun
Xu, Jun
Fang, Xuanlai
Date Issued
September 2012
Journal
Physics Letters A
Publisher
Elsevier B.V.
Citation
Jing, Yun, Jun Xu, and Nicholas X. Fang. "Numerical study of a near-zero-index acoustic metamaterial." Physics Letters A, 376:45 (1 October 2012), pp. 2834–2837.
Version
Author's final manuscript
Abstract
This Letter studies a two-dimensional, membrane-based acoustic metamaterial with a near-zero refractive index. It yields a frequency-dependent effective density that is near-zero at a narrow frequency band centered around its first resonant frequency. This effective density results in its near-zero refractive index. Numerical simulations are shown which demonstrate that the phase in this metamaterial undergoes small changes, and the metamaterial functions as an angular filter such that only a wave with a near-zero incident angle can transmit. Its ability to tailor acoustic phase pattern is also discussed in this Letter.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1016/j.physleta.2012.08.057
