FAR-INFRARED SPECTROSCOPY OF CONFINED LO PHONONS IN [113]-GAAS ALAS SUPERLATTICES/

Authors
QUECK D LUERSSEN D KALT H
Citation
D. Queck et al., FAR-INFRARED SPECTROSCOPY OF CONFINED LO PHONONS IN [113]-GAAS ALAS SUPERLATTICES/, Physica status solidi. b, Basic research, 207(1), 1998, pp. 299-305
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
207
Issue
1
Year of publication
1998
Pages
299 - 305
Database
ISI
SICI code
0370-1972(1998)207:1<299:FSOCLP>2.0.ZU;2-M
Abstract
We report on the observation of both, GaAs and AlAs confined longitudi nal optical (LO) phonons in Fourier transform infrared (FTIR) reflecti on measurements of [113] GaAs/AlAs superlattices. This observation is possible due to the use of samples grown on doped substrates in combin ation with the technique of oblique beam incidence. The phonon dispers ions determined from the energies of the confined LO1 and LO3 modes in the GaAs and AlAs layers are in good agreement with theoretical predi ctions if the influence of interface roughness is accounted for.