Propagation of Large-Wave-Vector Acoustic Phonons in Semiconductors
- 27 October 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (17), 1432-1435
- https://doi.org/10.1103/physrevlett.45.1432
Abstract
The spatial and temporal characteristics of phonon pulses generated in the interband energy relaxation process of photoexcited pairs in GaAs and InP are reported. With use of a superconducting Pb tunnel junction as a phonon threshold detector, it is shown that the energy transport occurs via near-zone-edge transverse acoustic phonons and that over lengths of the order of several millimeters the pulse propagation shows all features of ballistic transport in a dispersive medium.
Keywords
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