Extraordinary acoustic transmission through a 1D grating with very narrow apertures.
Recently, there has been an increased interest in studying extraordinary optical transmission (EOT) through subwavelength aperture arrays perforated in a metallic film. In this Letter, we report that the transmission of an incident acoustic wave through a one-dimensional acoustic grating can also be drastically enhanced. This extraordinary acoustic transmission (EAT) has been investigated both theoretically and experimentally, showing that the coupling between the diffractive wave and the wave-guide mode plays an important role in EAT. This phenomenon can have potential applications in acoustics and also might provide a better understanding of EOT in optical subwavelength systems.
Lu
Ming-Hui
MH
National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, People's Republic of China.
Liu
Xiao-Kang
XK
Feng
Liang
L
Li
Jian
J
Huang
Cheng-Ping
CP
Chen
Yan-Feng
YF
Zhu
Yong-Yuan
YY
Zhu
Shi-Ning
SN
Ming
Nai-Ben
NB