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Acoustic attenuation measurements in transparent materials in the hypersonic range by picosecond ultrasonics
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10.1063/1.2372745
/content/aip/journal/apl/89/19/10.1063/1.2372745
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/19/10.1063/1.2372745

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of the experimental setup. The blue probe beam is obtained using a doubling crystal (times 2). (b) Sample configuration. An acoustic pulse is launched by the pump in the Al transducer at the sample surface. The probe beam monitors the pulse propagation in all the sample. (c) Typical experimental signal obtained on an Al sample using a blue probe.

Image of FIG. 2.
FIG. 2.

Experimental signals from three samples whose thicknesses are (a) , (b) , and (c) . (d) Superimposition of the same three signals and the exponential fit from which the attenuation factor is measured.

Image of FIG. 3.
FIG. 3.

Fourier intensity of an acoustic pulse at three different steps of its propagation in a layer submitted to an acoustic attenuation. Marks indicate the two Fourier components detected in our experiments as oscillations. One should note they are differently affected by the attenuation due to the frequency difference.

Tables

Generic image for table
Table I.

Acoustic attenuation factors measured in thin dielectric layers using the protocol described in the text. It is based on the comparison of the reflectivity signals measured in different film thicknesses. The attenuation factor at is given by the product .

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/content/aip/journal/apl/89/19/10.1063/1.2372745
2006-11-07
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acoustic attenuation measurements in transparent materials in the hypersonic range by picosecond ultrasonics
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/19/10.1063/1.2372745
10.1063/1.2372745
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