Multi-band asymmetric acoustic transmission in a bended waveguide with multiple mechanisms

被引：25

作者：

Huang, Yu-lei ^{[1
]}

Sun, Hong-xiang ^{[1
,2
]}

Xia, Jian-ping ^{[1
]}

Yuan, Shou-qi ^{[1
]}

Ding, Xin-lei ^{[1
]}

机构：

[1] Jiangsu Univ, Res Ctr Fluid Machinery Engn & Technol, Zhenjiang 212013, Peoples R China

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

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Acoustic transmission - Asymmetric transmissions - Multi band - Multiple-band - Phononic Crystal - Square rods;

D O I：

10.1063/1.4955268

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the realization of a multi-band device of the asymmetric acoustic transmission by placing a phononic crystal inside a bended waveguide immersed in water, as determined both experimentally and numerically. The asymmetric acoustic transmission exists in three frequency bands below 500 kHz induced by multiple mechanisms. Besides the band gap of the phononic crystal, we also introduce the deaf mode and interaction between the phononic crystal and waveguide. More importantly, this asymmetric transmission can be systematically controlled by mechanically rotating the square rods of the phononic crystal. The device has the advantages of multiple band, broader bandwidth, and adjustable property, showing promising applications in ultrasonic devices. Published by AIP Publishing.

引用

页数：5

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