Title :
Asymmetric lamb wave propagation in graded grating phononic crystal slabs
Author :
Jiu-jiu Chen ; Hong-bo Zhang ; Xu Han
Author_Institution :
State Key Lab. of Adv. Design & Manuf. for Vehicle Body, Hunan Univ., Changsha, China
Abstract :
The unidirectional transmission of Lamb wave in low-frequency domains is realized by graded grating phononic crystal slabs This exotic phenomenon stems from the threshold frequency of the fundamental antisymmetric Lamb mode conversion to the fundamental symmetric Lamb mode is different at the different locations of the acoustic diode. This should be potentially significant in helping design chip-scale directional phononic devices.
Keywords :
acoustic wave propagation; acoustic wave transmission; phononic crystals; slabs; surface acoustic waves; acoustic diode; asymmetric Lamb wave propagation; chip-scale directional phononic devices; exotic phenomenon; graded grating phononic crystal slabs; low-frequency domains; threshold frequency; unidirectional transmission; Acoustic waves; Crystals; Frequency conversion; Gratings; Rectifiers; Slabs; Asymmetric propagation; Phononic crystal slabs;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-4814-0
DOI :
10.1109/SPAWDA.2012.6464118
