Title :
Acoustoelectric detection of ultrasound power with composite piezoelectric and semiconductor devices
Author :
Dietz, Dennis R. ; Busse, Lawrence J. ; Fife, Michael J.
Author_Institution :
Tetrad Corp. Engelwood, CO, USA
fDate :
3/1/1988 12:00:00 AM
Abstract :
The acoustoelectric interaction between an ultrasound wave propagating in a thin piezoelectric plate and an adjacent semiconductor results in a current that is proportional to the ultrasound intensity. These devices, inherently insensitive to the phase of the acoustic wavefront, can be used for large-area total power meters as well as spot intensity meters. They have broadband response and are capable of following the envelope of typical diagnostic imaging pulses. A previously derived model describing the interaction is reviewed. Experimental results obtained with several detectors are presented, including sensitivity and frequency response.<>
Keywords :
piezoelectric transducers; ultrasonic measurement; ultrasonic transducers; acoustoelectric interaction; broadband response; composite piezoelectric and semiconductor devices; diagnostic imaging; frequency response; intensity meters; sensitivity; total power meters; ultrasound intensity; ultrasound power; Acoustic devices; Acoustic signal detection; Acoustic waves; Detectors; Force measurement; Piezoelectric devices; Power measurement; Semiconductor devices; Semiconductor materials; Ultrasonic imaging;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on