Tunable prism based on piezoelectric metamaterial for acoustic beam steering

被引：65

作者：

Xu, J. ^{[1
]}

Tang, J. ^{[1
]}

机构：

[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA

来源：

APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 18期

基金：

美国国家科学基金会;

关键词：

WAVE-PROPAGATION; BAND-GAPS; LOCALIZATION; RODS;

D O I：

10.1063/1.4982717

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter reports a tunable acoustic prism featuring continuous beam steering for transverse waves at a single frequency. The proposed prism is comprised of arrayed piezoelectric unit-cells with individually connected inductive shunt circuits. Taking advantage of wave velocity shifting in the vicinity of the local resonant frequency of unit-cells, we can steer the harmonic transverse wave by adjusting the inductive loads, i.e., tuning the inductances. This beam steering mechanism is facilitated by add-on piezoelectric circuitry through electro-mechanical coupling, whereas the host medium is not altered. Our analysis shows that the propagation direction of an acoustic wave has a tuning range of more than 30 degrees. This tunable prism can be used as an acoustic metamaterial for various devices operating at broadband frequencies.

引用

页数：5

共 34 条

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