Nonlinear Acoustics at GHz Frequencies in a Viscoelastic Fragile Glass Former
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PhysRevLett.114.065701.pdf
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Author(s)
Klieber, Christoph
Gusev, Vitalyi E.
Pezeril, Thomas
Nelson, Keith Adam
Date Issued
February 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Klieber, Christoph, Vitalyi E. Gusev, Thomas Pezeril, and Keith A. Nelson. “Nonlinear Acoustics at GHz Frequencies in a Viscoelastic Fragile Glass Former.” Physical Review Letters 114, no. 6 (February 2015). © 2015 American Physical Society
Version
Final published version
Abstract
Using a picosecond pump-probe ultrasonic technique, we study the propagation of high-amplitude, laser-generated longitudinal coherent acoustic pulses in the viscoelastic fragile glass former DC704. We observe an increase of almost 10% in acoustic pulse propagation speed at the highest optical pump fluence which is a result of the supersonic nature of nonlinear propagation in the viscous medium. From our measurement, we deduce the nonlinear acoustic parameter of the glass former in the gigahertz frequency range across the glass transition temperature.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.114.065701
