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108497 |
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|a Jing, Yun
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|a Massachusetts Institute of Technology. Department of Mechanical Engineering
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|a Fang, Xuanlai
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|a Xu, Jun
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|a Fang, Xuanlai
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|a Xu, Jun
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|a Fang, Xuanlai
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|a Numerical Study of a near-Zero-Index Acoustic Metamaterial
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|b Elsevier B.V.,
|c 2017-04-28T17:44:23Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/108497
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|a 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.
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|a Article
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|t Physics Letters A
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