Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.055501
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Funding
- DTRA YIP Award [HDTRA1-12-1-0022]
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We introduce the acoustic equivalent of supercoupling'' by studying the anomalous sound transmission and uniform energy squeezing through ultranarrow acoustic channels filled with zero-density metamaterials. As a realistic example, we propose their realization by inserting transverse membranes with a subwavelength period along the channel, and we prove a novel form of acoustic tunneling based on impedance matching and infinite phase velocity at the zero-density operation. We envision applications in sensing, noise control, cloaking, and energy harvesting.
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