J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-631 - C6-633|
J. Phys. Colloques 42 (1981) C6-631-C6-633
LIGHT SCATTERING FROM PHONONS IN GaAs-AlAs SUPERLATTICESC. Colvard1, 2, R. Merlin1, 2, 3, M. V. Klein1, 4, 5 et A.C. Gossard6
1 Materials Research Laboratory, University of Illinois at Urbana-Champaign,Urbana, Illinois 61801, U.S.A.
2 Also at Dept. of Physics, Univ. of Illinois at Urbana-Champaign
3 Also at Coordinated Science Laboratory, Univ. of Illinois at Urbana-Champaign
4 Also at Dept. of Physics, Univ. of Illinois at Urbana-Champaign
5 Also Coordinated Science Laboratory, Univ. of Illinois at Urbana-Champaign
6 Bell Laboratories, Murray Hill, New Jersey 07974, U.S.A.
Raman scattering data have been taken on several GaAs-AIAs superlattices with d<40 Å. Folded LA and TA modes are both seen whose frequencies are well fit by an elastic model involving the bulk sound velocities of GaAs and AlAs. A number of peaks appear near the bulk LO and TO frequencies. Selection rules and a partial examination of resonance behavior are presented.