Scattering of surface acoustic waves by a phononic crystal revealed by heterodyne interferometry
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
3
Series
Applied Physics Letters, Volume 91, issue 8, pp. 1-3
Abstract
Surface acoustic wave propagation within a two-dimensional phononic band gap structure has been studied using a heterodyne laser interferometer. Acoustic waves are launched by interdigital transducers towards a square lattice of holes etched in a piezoelectric medium. Interferometer measurements performed at frequencies lying below, within, and above the expected band gap frequency range provide direct information of the wave interaction with the phononic crystal, revealing anisotropic scattering into higher diffraction orders depending on the apparent grating pitch at the boundary between the phononic crystal and free surface. Furthermore, the measurements also confirm the existence of an elastic band gap, in accordance with previous electrical measurements and theoretical predictions.Description
Keywords
Other note
Citation
Kokkonen, K, Kaivola, M, Benchabane, S, Khelif, A & Laude, V 2007, 'Scattering of surface acoustic waves by a phononic crystal revealed by heterodyne interferometry', Applied Physics Letters, vol. 91, no. 8, 083517, pp. 1-3. https://doi.org/10.1063/1.2768910