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Reflection of high-frequency phonons at a solid-liquid helium interface: The role of phonon focusing

✍ Scribed by R.E. Horstman; J. Wolter


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
286 KB
Volume
62
Category
Article
ISSN
0375-9601

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Reflection of high-frequency acoustic ph
✍ G. Tas; C.J. Morath; H.J. Maris πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 204 KB

We have studied the reflection of coherent acoustic phonons at frequencies up to 300 GHz from solid-liquid interfaces using a picosecond ultrasonic technique. We report measurements of the magnitude of the reflection coefficient between both a-Si3N4 and a-SiO2, and ethylene glycol for temperatures f