Sound propagation in a highly damped Mo6S3I6 nanowire network measured by femtosecond pump-probe spectroscopy

Using femtosecond pump-probe spectroscopy we have measured the propagation of sound in a randomly formed Mo6S3I6 nanowire network for the first time. The pump-probe technique allows us to measure the reflection of an optical pulse from a propagating acoustical disturbance in spite of very high sound...

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Bibliographic Details
Published in:Journal of applied physics 2007-07, Vol.102 (1)
Main Authors: Kušar, Primož, Mihailovic, Dragan
Format: Article
Language:English
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Summary:Using femtosecond pump-probe spectroscopy we have measured the propagation of sound in a randomly formed Mo6S3I6 nanowire network for the first time. The pump-probe technique allows us to measure the reflection of an optical pulse from a propagating acoustical disturbance in spite of very high sound damping in the rather porous network medium. We use a range of different laser wavelengths from 0.7 to 2.4 μm and a measurement of the refractive index n, to obtain a value of sound velocity v=1630±160 m∕s.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2751400