Dynamic visualization of surface phonons in phononic crystals

Wright, O. B. and Veres, I. A. and Profunser, D. M. and Matsuda, O. and Culshaw, B. and Lang, U. (2011) Dynamic visualization of surface phonons in phononic crystals. Chinese Journal of Physics, 49 (1). pp. 16-22. ISSN 0577-9073

Abstract

Using ultrashort pulsed optical excitation and interferometric detection, we dynamically image ultrahigh-frequency surface acoustic phonon wavepackets on two-dimensional (2D) phononic crystals. The samples consist of a square lattice of air-filled holes etched in a silicon substrate. Good agreement is found when compared with time-domain finite element numerical simulations. By Fourier transformation, the dispersion relation is derived and stop bands are revealed. The spatial distributions of the acoustic eigenmodes at specific frequencies are also presented.

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• Item metadata

  Item type:	Article
  ID code:	40424
  Dates:	Date Event February 2011 Published
  Subjects:	Science > Physics
  Department:	Faculty of Engineering > Electronic and Electrical Engineering Technology and Innovation Centre > Sensors and Asset Management
  Depositing user:	Pure Administrator
  Date deposited:	17 Jul 2012 12:46
  Last modified:	11 Nov 2024 10:10
  Related URLs:	Journal or Publication
  URI:	https://strathprints.strath.ac.uk/id/eprint/40424