All-angle blockage of sound by an acoustic double-fishnet metamaterial

被引：32
作者：
Christensen, J. [1 ]
Martin-Moreno, L. [2 ]
Garcia-Vidal, F. J. [1 ]
机构：
[1] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain
[2] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, ICMA, E-50009 Zaragoza, Spain
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 13期
关键词：
NEGATIVE-INDEX METAMATERIALS; REFRACTIVE-INDEX;
D O I：
10.1063/1.3491289
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper we design an acoustic metamaterial for broadband sound blockage that is easy to fabricate and presents tunable capabilities. Two adjacent holey plates are predicted to support a gap mode which is responsible of a forbidden band, displaying a negative effective bulk modulus. This acoustic metamaterial exhibits a weak dispersion with parallel momentum implying that strong attenuation appears for a broad range of angles of incident sound. Its bandwidth can be tailored at will by varying the separation between the two holey plates. (C) 2010 American Institute of Physics. [doi:10.1063/1.3491289]
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页数：3
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