Mode profiles in waveguide‐coupled resonators
作者:
William D. Hunt,
Tom Cameron,
John C. B. Saw,
Yoonkee Kim,
Mark S. Suthers,
期刊:
Journal of Applied Physics
(AIP Available online 1993)
卷期:
Volume 74,
issue 8
页码: 4886-4893
ISSN:0021-8979
年代: 1993
DOI:10.1063/1.354320
出版商: AIP
数据来源: AIP
摘要:
Surface acoustic wave (SAW) waveguide‐coupled resonators are of considerable interest for narrow‐band filter applications, though to date there has been very little published on the acoustic details of their operation. As in any resonator, one must fully understand its mode structure and herein we study the SAW mode profiles in these devices. Transverse mode profiles in the resonant cavity of the device were measured at various frequencies of interest using a knife‐edge laser probe. In addition we predict the mode profiles for the device structure by two independent methods. One is a stack‐matrix approach adapted from integrated optics and the other is a conventional analytical eigenmode analysis of the Helmholtz equation. Both modeling techniques are in good agreement with the measured results.
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