声学
超材料
谐振器
反射(计算机编程)
声波
声音传输等级
传输(电信)
物理声学
声学空间
领域(数学)
声学超材料
物理
掩蔽
计算机科学
光学
电信
数学
程序设计语言
纯数学
作者
Badreddine Assouar,Bin Liang,Ying Wu,Yong Li,Jian‐Chun Cheng,Yun Jing
标识
DOI:10.1038/s41578-018-0061-4
摘要
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. Sound waves can be manipulated using structurally designed 2D materials of subwavelength thickness. This emerging field, namely, acoustic metasurfaces, is driven by the desire to control acoustic wave propagation using compact devices.
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