Anisotropic Metamaterials for Full Control of Acoustic Waves

被引：240

作者：

Christensen, Johan ^{[1
]}

Javier Garcia de Abajo, F. ^{[1
,2
]}

机构：

[1] IQFR CSIC, Madrid 28006, Spain

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Medical imaging - Computerized tomography - Metamaterials - Acoustic wave propagation - Light refraction;

D O I：

10.1103/PhysRevLett.108.124301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study a class of acoustic metamaterials formed by layers of perforated plates and producing negative refraction and backward propagation of sound. A slab of such material is shown to act as a perfect acoustic lens, yielding images with subwavelength resolution over large distances. Our study constitutes a nontrivial extension of similar concepts from optics to acoustics, capable of sustaining negative refraction over extended angular ranges, with potential application to enhanced imaging for medical and detection purposes, acoustofluidics, and sonochemistry.

引用

页数：5

共 22 条

[1]

BRUSS H, 2008, OXFORD MASTER SERIES

[2] Acoustic field enhancement and subwavelength imaging by coupling to slab waveguide modes [J].