Unidirectional acoustic transmission through a prism with near-zero refractive index

被引：153

作者：

Li, Yong ^{[1
,2
]}

Liang, Bin ^{[1
,2
]}

Gu, Zhong-ming ^{[1
]}

Zou, Xin-ye ^{[1
]}

Cheng, Jian-chun ^{[1
,2
]}

机构：

[1] Nanjing Univ, Inst Acoust, Dept Phys, Key Lab Modern Acoust,MOE, Nanjing 210093, Jiangsu, Peoples R China

[2] Chinese Acad Sci, State Key Lab Acoust, Beijing 100190, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.4817249

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a two-dimensional model of acoustic prism comprising metamaterials with near-zero refractive index to yield high efficiency unidirectional transmission and demonstrate an implementation by coiling up space. Due to the acoustic tunneling effect, the waveform is kept consistent between input and output waves, and the transmitted angle can be controlled by reshaping the prism, even in the presence of hard scatterer. A directional waveguide is also designed whose transmission property can be freely switched between all possible states. Our design may have potential for practical applications of acoustic one-way devices in various fields such as ultrasound imaging and treatment. (C) 2013 AIP Publishing LLC.

引用

页数：4

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