Directional excitation of the designer surface acoustic waves

被引：12
|
作者：
Lu, Jiuyang [1 ,2 ]
Qiu, Chunyin [1 ,2 ]
Ke, Manzhu [1 ,2 ]
Liu, Zhengyou [1 ,2 ,3 ]
机构：
[1] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nano Struct, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 20期
基金：
中国国家自然科学基金;
关键词：
SOUND; METASURFACES; RECTIFIER; PLASMONS;
D O I：
10.1063/1.4921397
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We propose an efficient design route to realize directional excitation of the structure-induced surface waves for airborne sound. The whole system consists of a periodically corrugated rigid plate combining with a pair of asymmetric narrow slits. The directional excitation of the mimicked surface waves stems from the destructive interference between the evanescent waves emitted from the double slits. The directionality can be switched conveniently by tuning the external frequency. The theoretical prediction is validated well by simulations and experiments. Promising applications can be anticipated such as in designing compact devices for airborne sound. (C) 2015 AIP Publishing LLC.
引用
收藏
页数：4
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