Surface resonant-states-enhanced acoustic wave tunneling in two-dimensional phononic crystals.
We show that by placing a metal plate next to a two-dimensional phononic crystal, acoustic waves can tunnel through the combined structure at a specific frequency that lies inside the band gap of the phononic crystal. The enhanced transmission is attributed to the coupling of the input waves with the acoustically resonant states created between the metal plate and the phononic crystal. Experiments are in excellent agreement with the theoretical predictions.
Key Lab of Acoustic and Photonic Materials and Devices of Ministry of Education and Department of Physics, Wuhan University, Wuhan 430072, China.
Manzhu
M
Ke
Zhaojian
Z
He
Shasha
S
Peng
Zhengyou
Z
Liu
Jing
J
Shi
Weijia
W
Wen
Ping
P
Sheng