| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-274 - C6-276 | |
| DOI | https://doi.org/10.1051/jphyscol:1981680 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-274-C6-276
DOI: 10.1051/jphyscol:1981680
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.A.
J. Phys. Colloques 42 (1981) C6-274-C6-276
DOI: 10.1051/jphyscol:1981680
MODULATION OF BALLISTIC PHONON FLUXES IN Ge BY A He GAS FILM AT A SOLID/SUPERFLUID INTERFACE
M. Greenstein et J.P. WolfeDepartment of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.A.
Abstract
A He gas bubble may be formed at the surface of a sample which is immersed in a superfluid He cooling bath and subject to intense optical excitation. We have discovered that this bubble oscillates at 1-10 KHz, under steady state optical excitation, and this leads to a modulation of the ballistic phonon flux intensity into the sample.