Numerical study of a near-zero-index acoustic metamaterial

Yun Jing, Jun Xu, Nicholas X. Fang

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Pages (from-to)2834-2837
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume376
Issue number45
DOIs
StatePublished - Oct 1 2012

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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