A recipe for making materials with negative refraction in acoustics

被引：16

作者：

Ramm, A. G. ^{[1
,2
]}

机构：

[1] Kansas State Univ, Dept Math, Manhattan, KS 66506 USA

[2] Tech Univ Darmstadt, Darmstadt, Germany

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 13期

关键词：

metarnaterials; Smart" materials; Wave scattering by small bodies;

D O I：

10.1016/j.physleta.2007.11.037

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A recipe is given for making materials with negative refraction in acoustics, i.e., materials in which the group velocity is directed opposite to the phase velocity. The recipe consists of injecting many small particles into a bounded domain, filled with a material whose refraction coefficient is known. The number of small particles to be injected per unit volume around any point x is calculated as well as the boundary impedances of the embedded particles. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2319 / 2321

页数：3