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Applied Physics Letters / Volume 97 / Issue 7 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 97, 073106 (2010); doi:10.1063/1.3479929 (3 pages)

Coherent elastic waves in a one-dimensional polymer hypersonic crystal

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

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(Received 24 June 2010; accepted 26 July 2010; published online 17 August 2010)

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

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KEYWORDS and PACS

Keywords

elastic waves, phonon dispersion relations, polymers, superlattices, ultrasonics

PACS

  • 62.65.+k

    Acoustical properties of solids

  • 62.30.+d

    Mechanical and elastic waves; vibrations

  • 63.20.D-

    Phonon states and bands, normal modes, and phonon dispersion

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.3479929

PUBLICATION DATA

ISSN:

0003-6951 (print)  
1077-3118 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

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