Numerical and experimental investigation SAW in langasite

Author

Yakovkin, I.B. ; Taziev, R.M. ; Kozlov, A.S.

Author_Institution

Inst. of Semicond. Phys., Acad. of Sci., Novosibirsk, Russia

Volume

1

fYear

1995

fDate

7-10 Nov 1995

Firstpage

389

Abstract

The present paper contains the complete numerical investigation of surface acoustics waves in langasite. The results are comprehensive contour-map and three-dimensional loci for velocity (Vo,Vm), beam steering (θ¹), electromechanical coupling factor (K ²), first and second temperature derivatives of delay times (TCD1, TCD2). Optimal cuts for multimode resonators (TCD1=0), for bandpass filter (K²=0.54%) and for sensors (TCD1=32.82 ppm/°C) are determined. The rotated Z+25° cut has large K²=0.26% and TCD1=0 at the room temperature. The surface transverse wave that propagates over this cut in X+90° exists only at the metalized surface

Keywords

acoustic materials; band-pass filters; delays; surface acoustic wave filters; surface acoustic wave resonators; surface acoustic wave sensors; surface acoustic waves; ultrasonic velocity; SAW velocity; bandpass filter; beam steering; contour-map; delay times; electromechanical coupling factor; langasite; multimode resonators; sensors; surface acoustics waves; surface transverse wave; three-dimensional loci; Band pass filters; Beam steering; Crystals; Numerical models; Optical coupling; Physics; Propagation delay; Surface acoustic waves; Surface waves; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495604

Filename

495604