Title :
Equality of the energy and group velocities of bulk acoustic waves in piezoelectric media
Author :
Laude, V. ; Reinhardt, Andreas ; Khelif, Abdelkrim
Author_Institution :
Departement LPMO, CNRS UMR, Besancon, France
Abstract :
The equality of the energy and group velocities of bulk acoustic waves in a lossless piezoelectric medium is demonstrated, with the energy velocity defined from the generalized energy density and the generalized Poynting vector.
Keywords :
acoustic wave effects; piezoelectricity; bulk acoustic waves; energy velocity; generalized Poynting vector; generalized energy density; group velocity; piezoelectric media; Acoustic waves; Capacitive sensors; Dielectrics; Frequency; Genetic expression; Kinetic theory; Lithium niobate; Magnetic fields; Surface waves; Tensile stress;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2005.1561643
