Acoustic metamaterial with negative density

Sam Hyeon Lee, Choon Mahn Park, Yong Mun Seo, Zhi Guo Wang, Chul Koo Kim

Research output: Contribution to journalArticle

239 Citations (Scopus)

Abstract

We fabricated a one-dimensional acoustic metamaterial with negative effective density using an array of very thin elastic membranes. We observed acoustic equivalence of the plasma oscillation at ωc = 735 Hz. The metamaterial was opaque in the frequency range from 0 to 735 Hz, and was transparent above 735 Hz. We report direct observation of negative acceleration in this acoustic medium below 735 Hz. The frequency characteristics of the metamaterial have the same form as that of metals with negative permittivity. We also provide a simple theory to explain the experimental results.

Original languageEnglish
Pages (from-to)4464-4469
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume373
Issue number48
DOIs
Publication statusPublished - 2009 Dec 7

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acoustics
plasma oscillations
equivalence
frequency ranges
permittivity
membranes
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Lee, Sam Hyeon ; Park, Choon Mahn ; Seo, Yong Mun ; Wang, Zhi Guo ; Kim, Chul Koo. / Acoustic metamaterial with negative density. In: Physics Letters, Section A: General, Atomic and Solid State Physics. 2009 ; Vol. 373, No. 48. pp. 4464-4469.
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Acoustic metamaterial with negative density. / Lee, Sam Hyeon; Park, Choon Mahn; Seo, Yong Mun; Wang, Zhi Guo; Kim, Chul Koo.

In: Physics Letters, Section A: General, Atomic and Solid State Physics, Vol. 373, No. 48, 07.12.2009, p. 4464-4469.

Research output: Contribution to journalArticle

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