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Acoustic metasurfaces
Nature Reviews Materials ( IF 83.5 ) Pub Date : 2018-10-17 , DOI: 10.1038/s41578-018-0061-4
Badreddine Assouar , Bin Liang , Ying Wu , Yong Li , Jian-Chun Cheng , Yun Jing

Acoustic metasurfaces derive their characteristics from the interaction between acoustic waves and specifically designed materials. The field is driven by the desire to control acoustic wave propagation using compact devices and is governed by fundamental and physical principles that provide the design rules and the functionality of a wave. Acoustic metasurfaces have added value and unusual functionalities compared with their predecessor in materials science, namely, acoustic metamaterials. These rationally designed 2D materials of subwavelength thickness provide a new route for sound wave manipulation. In this Review, we delineate the fundamental physics of metasurfaces, describe their different concepts and design strategies, and discuss their functionalities for controllable reflection, transmission and extraordinary absorption. In particular, we outline the main designs of acoustic metasurfaces, including those based on coiling-up space, Helmholtz-resonator-like and membrane-type structures, and discuss their applications, such as beam focusing, asymmetrical transmission and self-bending beams. We conclude with an outlook of the future directions in this emerging field.



中文翻译:

声学超表面

声学超表面是通过声波与专门设计的材料之间的相互作用获得其特征的。该领域由使用紧凑型设备控制声波传播的需求所驱动,并且受提供设计规则和波功能的基本原理和物理原理支配。与其在材料科学中的前身(即声学超材料)相比,声学超表面具有附加值和不寻常的功能。这些合理设计的亚波长厚度的2D材料为声波操纵提供了一条新途径。在这篇综述中,我们描述了超表面的基本物理学,描述了它们的不同概念和设计策略,并讨论了其可控反射,透射和非凡吸收的功能。尤其是,我们概述了声学超表面的主要设计,包括基于盘绕空间,类似于亥姆霍兹谐振器和膜型结构的表面,并讨论了它们的应用,例如束聚焦,不对称透射和自弯曲束。我们以对这一新兴领域的未来方向的展望作为结束。

更新日期:2019-01-26
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