Title :
Phase-shifted surface-acoustic-wave resonator
Author :
Kantor, Beniamin ; Zehavi, Sharon ; Salzman, Joseph
Author_Institution :
Dept. of Electr. Eng., Technion-Israel, Haifa, Israel
fDate :
5/1/1992 12:00:00 AM
Abstract :
The spatial distribution of the surface-acoustic-wave (SAW) intensity across a phase-shifted transducer-resonator is studied. A coupled-mode analysis of this structure shows that a highly confined mode can be excited in a pi /2 shifted resonator. Experimental verification of this conclusion was obtained in a LiNbO/sub 3/ pi /2 shifted resonator, in which the SAW intensity was measured. The concentration factor (the ratio of the maximum to average SAW intensity) can be approximately 10 for reasonably long resonators.<>
Keywords :
acoustic resonators; lithium compounds; surface acoustic wave devices; LiNbO/sub 3/ resonator; SAW intensity; concentration factor; confined mode; coupled-mode analysis; phase shifted surface acoustic wave resonator; phase-shifted transducer-resonator; spatial distribution; Coupled mode analysis; Electrodes; Gratings; Laser modes; Optical filters; Optical modulation; Optical resonators; Optical surface waves; Optical waveguides; Surface acoustic waves;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
