Title :
Acoustic wave transmission in asymmetric dual-metal gratings
Author :
Hong-bo Zhang ; Jiu-jiu Chen ; Xu Han
Author_Institution :
State Key Lab. of Adv. Design & Manuf. for Vehicle Body, Hunan Univ., Changsha, China
fDate :
Oct. 30 2014-Nov. 2 2014
Abstract :
In this work, we investigate asymmetric acoustic transmission (AAT) in dual-metal grating structures composed of two gratings with different structures. The calculated results show that AAT can be obtained in both directions. By modulating the structural parameters, the transmittance approaches to 0 and 0.63 in the two opposite directions, respectively, because transmission suppression occurs in one direction. We find that the AAT phenomenon originates from the coupling between the two single-metal gratings. Such kind of A AT could open possibilities in achieving novel acoustic devices.
Keywords :
acoustic wave transmission; acoustic devices; acoustic wave transmission; asymmetric acoustic transmission phenomenon; asymmetric dual-metal gratings; single-metal gratings; structural parameters; transmission suppression; Acoustic waves; Finite difference methods; Finite element analysis; Gratings; Nickel; Acoustic waves; FEM: FDTD;
Conference_Titel :
Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA), 2014 Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-6424-6
DOI :
10.1109/SPAWDA.2014.6998605
