Giant concentration by extraordinary acoustic transmission in metamaterials

Sam H. Lee, Jong Jin Park, Myoung Ki Jung, K. J.B. Lee, Oliver B. Wright

Research output: Contribution to conferencePaper

Abstract

We realized zero-mass metamaterials by making the inertance of membrane-covered air holes close to zero. We thereby experimentally and theoretically demonstrate a new mechanism for acoustic extraordinary transmission. For a filling fraction of 1 % we obtained a 57% transmission intensity (76% in amplitude); this implies that on resonance the particle velocity inside a hole is 76 times greater than that of incident wave, corresponding to an intensification of the acoustic energy density by a factor of 5700. Such a high concentration of acoustic energy into a small hole of radius r = λ/56 enables sensitive detection of acoustic signals with subwave-length resolution. Potential applications include scanning near-field acoustic microscopy.

Original languageEnglish
Pages2654-2661
Number of pages8
Publication statusPublished - 2013
Event20th International Congress on Sound and Vibration 2013, ICSV 2013 - Bangkok, Thailand
Duration: 2013 Jul 72013 Jul 11

Other

Other20th International Congress on Sound and Vibration 2013, ICSV 2013
CountryThailand
CityBangkok
Period13/7/713/7/11

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Lee, S. H., Park, J. J., Jung, M. K., Lee, K. J. B., & Wright, O. B. (2013). Giant concentration by extraordinary acoustic transmission in metamaterials. 2654-2661. Paper presented at 20th International Congress on Sound and Vibration 2013, ICSV 2013, Bangkok, Thailand.