PHONON PROPERTIES OF (211) ORIENTED (GAAS)M (ALAS)N SUPERLATTICES/

Authors
POPOVIC ZV RICHTER E SPITZER J CARDONA M NOTZEL R PLOOG K
Citation
Zv. Popovic et al., PHONON PROPERTIES OF (211) ORIENTED (GAAS)M (ALAS)N SUPERLATTICES/, Superlattices and microstructures, 14(2-3), 1993, pp. 173-182
Citations number
19
Categorie Soggetti
Physics, Condensed Matter
Journal title
Superlattices and microstructures → ACNP
ISSN journal
07496036
Volume
14
Issue
2-3
Year of publication
1993
Pages
173 - 182
Database
ISI
SICI code
0749-6036(1993)14:2-3<173:PPO(O(>2.0.ZU;2-H
Abstract
We present symmetry analysis, Raman and Brillouin scattering selection rules and Raman spectra of (GaAs)m/(AlAs)n superlattices grown on GaA s substrates of (211) orientation. Using lattice dynamical calculation s based on the shell model, an assignment of the observed confined opt ical and folded acoustic modes has been performed. The angular dispers ion and polarization mixing of the superlattice modes are studied in d etail. We demonstrate that the assignment of an effective wave vector q to the confined modes in [211] superlattices is similar to that perf ormed earlier for the [311] case.