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Coherent elastic waves in a one-dimensional polymer hypersonic crystal

Source: Appl. Phys. Lett. 97, 073106 (2010); doi:10.1063/1.3479929

Published 17 August 2010

KEYWORDS and PACS
Keywords
PACS
  • 62.65.+k
    Acoustical properties of solids
  • 62.30.+d
    Mechanical and elastic waves; vibrations in condensed matter
  • 63.20.D-
    Phonon states and bands, normal modes and phonon dispersion
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
P. M. Walker, J. S. Sharp, A. V. Akimov, and A. J. Kent
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
Using the methods of picosecond acoustics, we inject high amplitude hypersonic wavepackets into a polymer superlattice and optically detect the propagating coherent elastic waves. The spectrum of the optically detected signal shows the elastic modes typical for folded phonon dispersion curves. The experimental results and related modeling show the feasibility of using polymer one-dimensional hypersonic crystals as acoustic devices in the gigahertz frequency range. ©2010 American Institute of Physics
History: Received 24 June 2010; accepted 26 July 2010; published 17 August 2010
Permalink: http://link.aip.org/link/?APPLAB/97/073106/1

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