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Phonon reflection at a sapphire-vacuum interface

Taborek, Peter and Goodstein, David (1979) Phonon reflection at a sapphire-vacuum interface. Journal of Physics C: Solid State Physics, 12 (22). pp. 4737-4751. ISSN 0022-3719. doi:10.1088/0022-3719/12/22/016.

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Theoretical and experimental studies have been conducted of the transmission of phonons in sapphire and their reflection at a crystal-vacuum interface. The effects of crystal anisotropy on the reflection process are discussed in detail. The heat-pulse technique has been used to obtain high-resolution time-of-flight spectra as a function of the angle of incidence in accurately known crystallographic directions. The agreement with predictions from numerical calculations is excellent. The relevance of these observations to studies of the anomalous transmission of energy through a crystal-liquid helium interface is also discussed.

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Additional Information:Copyright © Institute of Physics and IOP Publishing Limited 1979. Received 1 February 1979. Supported in part by NSF Grant No. DMR77-00036 and a grant from the Caltech President’s Fund.
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Caltech President’s FundUNSPECIFIED
Issue or Number:22
Record Number:CaltechAUTHORS:TABjpc79
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10371
Deposited By: Archive Administrator
Deposited On:01 May 2008
Last Modified:12 Jul 2022 19:52

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