Broadband and broadangle extraordinary acoustic transmission through subwavelength apertures surrounded by fluids
Broadband and broadangle extraordinary acoustic transmission through subwavelength apertures surrounded by fluids
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DOI：
10.1088/1367-2630/16/8/083044
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发表时间：
2014-08-27
影响因子：
3.3
通讯作者：
Hibbins, A. P.
中科院分区：
文献类型：
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作者：
Carretero-Palacios, S.;Murray, A. R. J.;Hibbins, A. P.
我们提出了一种超宽带声波通过亚波长孔阵列传输的机制。考虑孔周围（或填充）的不同流体，这允许将最大透射带调谐到不同的入射角。对于某些配置，该总透射带可能出现在非常小的入射角处，使得系统对几乎垂直入射的声音“不可见”。为任何流体系统配置提供了特定入射角和该角度下最大透射率的解析表达式。
We present a mechanism for ultra-broadband transmission of acoustic waves through subwavelength hole arrays. Different fluids surrounding (or filling) the holes are considered, which allows tuning of the band of maximum transmission to different angles of incidence. For certain configurations, this band of total transmission may appear at very small incident angles, making the system 'invisible' to sound at almost normal incidence. Analytical expressions for the specific incident angle, and for maximum transmission at that angle, are provided for any fluid-system configuration.