Measurement of evanescent wave properties of a bulk acoustic wave resonator

Letters

K. Kokkonen, Johanna Meltaus, Tuomas Pensala, M. Kaivola

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

Acoustic wave fields in a thin-film bulk acoustic wave resonator are studied using a heterodyne laser interferometer. The measurement area is extended outside the active electrode region of the resonator, so that wave fields in both the active and surrounding regions can be characterized. At frequencies at which the region surrounding the resonator does not support laterally propagating acoustic waves, the analysis of the measurement data shows exponentially decaying amplitude fields outside the active resonator area, as suggested by theory. The magnitude of the imaginary wave vectors is determined by fitting an exponential function to the measured amplitude data, and thereby the experimentally determined dispersion diagram is extended into the region of imaginary wave numbers.
Original languageEnglish
Pages (from-to)557-559
Number of pages3
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume59
Issue number3
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

evanescent waves
Resonators
resonators
Acoustic waves
acoustics
Exponential functions
Interferometers
exponential functions
Thin films
Electrodes
Lasers
interferometers
diagrams
electrodes
thin films
lasers

Keywords

  • Acoustic measurements
  • acoustic waves
  • dispersion
  • optical resonators
  • optical surface waves
  • resonant frequency

Cite this

@article{109c6971c22b44aa86fbecdd5c574794,
title = "Measurement of evanescent wave properties of a bulk acoustic wave resonator: Letters",
abstract = "Acoustic wave fields in a thin-film bulk acoustic wave resonator are studied using a heterodyne laser interferometer. The measurement area is extended outside the active electrode region of the resonator, so that wave fields in both the active and surrounding regions can be characterized. At frequencies at which the region surrounding the resonator does not support laterally propagating acoustic waves, the analysis of the measurement data shows exponentially decaying amplitude fields outside the active resonator area, as suggested by theory. The magnitude of the imaginary wave vectors is determined by fitting an exponential function to the measured amplitude data, and thereby the experimentally determined dispersion diagram is extended into the region of imaginary wave numbers.",
keywords = "Acoustic measurements, acoustic waves, dispersion, optical resonators, optical surface waves, resonant frequency",
author = "K. Kokkonen and Johanna Meltaus and Tuomas Pensala and M. Kaivola",
year = "2012",
doi = "10.1109/TUFFC.2012.2228",
language = "English",
volume = "59",
pages = "557--559",
journal = "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control",
issn = "0885-3010",
publisher = "Institute of Electrical and Electronic Engineers IEEE",
number = "3",

}

Measurement of evanescent wave properties of a bulk acoustic wave resonator : Letters. / Kokkonen, K.; Meltaus, Johanna; Pensala, Tuomas; Kaivola, M.

In: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 59, No. 3, 2012, p. 557-559.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Measurement of evanescent wave properties of a bulk acoustic wave resonator

T2 - Letters

AU - Kokkonen, K.

AU - Meltaus, Johanna

AU - Pensala, Tuomas

AU - Kaivola, M.

PY - 2012

Y1 - 2012

N2 - Acoustic wave fields in a thin-film bulk acoustic wave resonator are studied using a heterodyne laser interferometer. The measurement area is extended outside the active electrode region of the resonator, so that wave fields in both the active and surrounding regions can be characterized. At frequencies at which the region surrounding the resonator does not support laterally propagating acoustic waves, the analysis of the measurement data shows exponentially decaying amplitude fields outside the active resonator area, as suggested by theory. The magnitude of the imaginary wave vectors is determined by fitting an exponential function to the measured amplitude data, and thereby the experimentally determined dispersion diagram is extended into the region of imaginary wave numbers.

AB - Acoustic wave fields in a thin-film bulk acoustic wave resonator are studied using a heterodyne laser interferometer. The measurement area is extended outside the active electrode region of the resonator, so that wave fields in both the active and surrounding regions can be characterized. At frequencies at which the region surrounding the resonator does not support laterally propagating acoustic waves, the analysis of the measurement data shows exponentially decaying amplitude fields outside the active resonator area, as suggested by theory. The magnitude of the imaginary wave vectors is determined by fitting an exponential function to the measured amplitude data, and thereby the experimentally determined dispersion diagram is extended into the region of imaginary wave numbers.

KW - Acoustic measurements

KW - acoustic waves

KW - dispersion

KW - optical resonators

KW - optical surface waves

KW - resonant frequency

U2 - 10.1109/TUFFC.2012.2228

DO - 10.1109/TUFFC.2012.2228

M3 - Article

VL - 59

SP - 557

EP - 559

JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

SN - 0885-3010

IS - 3

ER -