Broadband acoustic diode by using two structured impedance-matched acoustic metasurfaces

被引：49
作者：
Wang, Xiao-Peng [1 ]
Wan, Le-Le
Chen, Tian-Ning
Liang, Qing-Xuan
Song, Ai-Ling
机构：
[1] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 04期
基金：
中国国家自然科学基金;
关键词：
SOUND;
D O I：
10.1063/1.4960019
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
An acoustic diode (AD) is proposed and designed based on a mechanism different from the previous designs by using two structured impedance-matched acoustic metasurfaces. This AD can realize unidirectional acoustic transmission within a broad band with high transmission efficiency due to the impedance-matching condition while allowing other entities such as objects or fluids to pass freely. What is more, the backtracking waves that come from the incoming waves can be efficiently prevented and cannot disturb the source. The acoustic pressure field distribution, intensity distribution, and transmission efficiency are calculated by using the finite element method. The simulation results agree well with the theoretical predictions. Our proposed mechanism can experimentally provide a simple approach to design an AD and have potential applications in various fields such as medical ultrasound and noise insulation. Published by AIP Publishing.
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页数：4
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