Title :
Gap acousto-electric waves in structures of arbitrary anisotropy
Author :
Darinskii, A.N. ; Weihnacht, M.
Author_Institution :
Inst. of Crystallogr., Acad. of Sci., Moscow, Russia
Abstract :
A theoretical study has been performed of the acousto-electric waves guided by an air gap between two identical piezoelectric crystals of arbitrary anisotropy. The permissible number of such gap waves traveling slower than all bulk modes in the structure has been established. The interdependence between the existence of these "subsonic" gap waves and surface acoustic waves on the mechanically free surface of crystals constituting the structure has been investigated. The occurrence of leaky gap waves also has been discussed. In addition, the specific features of the resonance reflection in gap structures caused by the excitation of leaky waves have been analyzed.
Keywords :
acoustic wave propagation; acoustoelectric effects; piezoelectric materials; surface acoustic waves; arbitrary anisotropy; bulk modes; gap acousto-electric waves; gap structures; identical piezoelectric crystals; leaky gap waves; mechanically free surface; resonance reflection; surface acoustic waves; Acoustic reflection; Acoustic waves; Anisotropic magnetoresistance; Capacitive sensors; Crystals; Resonance; Solids; Surface acoustic waves; Surface waves; Tunneling;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2006.1593380
