According to surface transient excitation theory of elastic wave for piezoelectric crystal,in the surface of a piezoelectric crystal can exist acoustical high velocity head wave except the general surface acoustic wav...According to surface transient excitation theory of elastic wave for piezoelectric crystal,in the surface of a piezoelectric crystal can exist acoustical high velocity head wave except the general surface acoustic wave(SAW).Such a mode is to propagate with the group velocity of the longitudinal bulk wave along the crystal surface.For ST quartz its value is 5.744×10^(3)m/s,which agrees with our experiments.The fact that the longitudinal head wave mode has a high propagation velocity offerspotential applications for high frequency SAW devices.展开更多
基金Supported by National Natural Science Foundation of China under Grant No.19571063.
文摘According to surface transient excitation theory of elastic wave for piezoelectric crystal,in the surface of a piezoelectric crystal can exist acoustical high velocity head wave except the general surface acoustic wave(SAW).Such a mode is to propagate with the group velocity of the longitudinal bulk wave along the crystal surface.For ST quartz its value is 5.744×10^(3)m/s,which agrees with our experiments.The fact that the longitudinal head wave mode has a high propagation velocity offerspotential applications for high frequency SAW devices.
