Beam steering of the acoustic metasurface under a subwavelength periodic modulation

被引：15
作者：
Cai, Li [1 ]
Wen, Jihong [1 ]
Yu, Dianlong [1 ]
Lu, Zhimiao [1 ]
Chen, Xing [1 ]
Zhao, Xiang [1 ]
机构：
[1] Natl Univ Def Technol, Coll Mechatron Engn & Automat, Sci & Technol Integrated Logist Support Lab, Vibrat & Acoust Res Grp, Changsha 410073, Hunan, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 20期
基金：
中国国家自然科学基金;
关键词：
WAVE-FRONT; LIGHT; MANIPULATION; REFLECTION;
D O I：
10.1063/1.5001954
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this study, we introduce a subwavelength periodic thin plate array into an acoustic metasurface and investigate the modulation effect on acoustic surface waves. Both anomalous sound refraction and reflection are observed in the metasurface, and an analytic expression is derived to clarify the underlying mechanism. We theoretically prove that flexible beam steering can be realized by phase gradient acoustic metasurfaces with deep subwavelength periodic modulation. This study potentially adds another degree of freedom to controlling sound transmission by using an acoustic metasurface. Published by AIP Publishing.
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页数：5
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