Acoustic metamaterial with negative modulus

被引：251

作者：

Lee, Sam Hyeon ^{[1
]}

Park, Choon Mahn ^{[2
]}

Seo, Yong Mun ^{[3
]}

Wang, Zhi Guo ^{[4
]}

Kim, Chul Koo ^{[1
]}

机构：

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

[2] Anyang Univ, AEE Ctr, Anyang 430714, South Korea

[3] Myongji Univ, Dept Phys, Yongin 449728, South Korea

[4] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 17期

关键词：

LOW-FREQUENCY PLASMONS; CLOAKING;

D O I：

10.1088/0953-8984/21/17/175704

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present experimental and theoretical results on an acoustic metamaterial that exhibits a negative effective modulus in a frequency range from 0 to 450 Hz. A one-dimensional acoustic metamaterial with an array of side holes on a tube was fabricated. We observed that acoustic waves above 450 Hz propagated well in this structure, but no sound below 450 Hz passed through. The frequency characteristics of the metamaterial has the same form as that of the permittivity in metals due to the plasma oscillation. We also provide a theory to explain the experimental results.

引用

页数：4

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