Acoustic transmission enhancement through a periodically structured stiff plate without any opening.
We report both experimentally and theoretically that enhanced acoustic transmission can occur in the subwavelength region through a thin but stiff structured plate without any opening. This exotic acoustic phenomenon is essentially distinct from the previous related studies originated from, either collectively or individually, the interaction of the incident wave with openings in previous structures. It is attributed to the structure-induced resonant excitation of the nonleaky Lamb modes that exist intrinsically in the uniform elastic plate. Our finding should have an impact on ultrasonic applications.
He
Zhaojian
Z
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China.
Jia
Han
H
Qiu
Chunyin
C
Peng
Shasha
S
Mei
Xuefei
X
Cai
Feiyan
F
Peng
Pai
P
Ke
Manzhu
M
Liu
Zhengyou
Z