Giant Acoustic Concentration by Extraordinary Transmission in Zero-Mass Metamaterials

被引：116

作者：

Park, Jong Jin ^{[1
]}

Lee, K. J. B. ^{[2
]}

Wright, Oliver B. ^{[3
]}

Jung, Myoung Ki ^{[1
]}

Lee, Sam H. ^{[1
]}

机构：

[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

[2] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea

[3] Hokkaido Univ, Div Appl Phys, Fac Engn, Sapporo, Hokkaido 0608628, Japan

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 24期

基金：

新加坡国家研究基金会;

关键词：

SUBWAVELENGTH HOLE ARRAYS; OPTICAL-TRANSMISSION; SURFACE-PLASMONS; GRATINGS;

D O I：

10.1103/PhysRevLett.110.244302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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