Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3655141
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- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0953311] Funding Source: National Science Foundation
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We propose the use of an ultrathin cloak made of an acoustic surface impedance that leads to invisibility for acoustic waves. Unlike current acoustic cloaks that require volumetric metamaterials and a significant shell thickness, the mantle cloak presented here is based on a patterned acoustic metasurface that produces similar effects in a thinner geometry. We show that by covering a cylindrical obstacle by a specific acoustic surface impedance, the total scattering may be significantly reduced in the near-and the far-field, thus suppressing its overall acoustic signature. Potential applications lie in low-detectability, camouflaging, and non-invasive acoustic probing. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3655141]
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