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Giant acoustic concentration by extraordinary transmission in zero-mass metamaterials

Title
Giant acoustic concentration by extraordinary transmission in zero-mass metamaterials
Authors
Park J.J.Lee K.J.B.Wright O.B.Jung M.K.Lee S.H.
Ewha Authors
이공주복
SCOPUS Author ID
이공주복scopus
Issue Date
2013
Journal Title
Physical Review Letters
ISSN
0031-9007JCR Link
Citation
vol. 110, no. 24
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We demonstrate 97%, 89%, and 76% transmission of sound amplitude in air through walls perforated with subwavelength holes of areal coverage fractions 0.10, 0.03, and 0.01, respectively, producing 94-, 950-, and 5700-fold intensity enhancements therein. This remarkable level of extraordinary acoustic transmission is achieved with thin tensioned circular membranes, making the mass of the air in the holes effectively vanish. Imaging the pressure field confirms incident-angle independent transmission, thus realizing a bona fide invisible wall. Applications include high-resolution acoustic sensing. © 2013 American Physical Society.
DOI
10.1103/PhysRevLett.110.244302
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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