Amplification of acoustic evanescent waves using metamaterial slabs

Choon Mahn Park, Jong Jin Park, Seung Hwan Lee, Yong Mun Seo, Chul Koo Kim, Sam H. Lee

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

We amplified acoustic evanescent waves using metamaterial slabs with a negative effective density. For the amplifying effect of the slab to overcome the dissipation, it is necessary that the imaginary part of the effective density is much smaller than the real part, a condition not satisfied so far. We report the construction of membrane-based two-dimensional negative-density metamaterials which exhibited remarkably small dissipation. Using a slab of this metamaterial we realized a 17-fold net amplitude gain at a remote distance from the evanescent wave source. Potential applications include acoustic superlensing.

Original languageEnglish
Article number194301
JournalPhysical Review Letters
Volume107
Issue number19
DOIs
Publication statusPublished - 2011 Nov 1

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evanescent waves
slabs
acoustics
dissipation
membranes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Park, Choon Mahn ; Park, Jong Jin ; Lee, Seung Hwan ; Seo, Yong Mun ; Kim, Chul Koo ; Lee, Sam H. / Amplification of acoustic evanescent waves using metamaterial slabs. In: Physical Review Letters. 2011 ; Vol. 107, No. 19.
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Amplification of acoustic evanescent waves using metamaterial slabs. / Park, Choon Mahn; Park, Jong Jin; Lee, Seung Hwan; Seo, Yong Mun; Kim, Chul Koo; Lee, Sam H.

In: Physical Review Letters, Vol. 107, No. 19, 194301, 01.11.2011.

Research output: Contribution to journalArticle

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