INFRARED-SPECTROSCOPY OF CONFINED OPTICAL AND FOLDED ACOUSTICAL PHONONS IN STRAINED CDSE CDS SUPERLATTICES/

Authors
GOPPERT M HETTERICH M DINGER A KLINGSHIRN C ODONNELL KP
Citation
M. Goppert et al., INFRARED-SPECTROSCOPY OF CONFINED OPTICAL AND FOLDED ACOUSTICAL PHONONS IN STRAINED CDSE CDS SUPERLATTICES/, Physical review. B, Condensed matter, 57(20), 1998, pp. 13068-13071
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
57
Issue
20
Year of publication
1998
Pages
13068 - 13071
Database
ISI
SICI code
0163-1829(1998)57:20<13068:IOCOAF>2.0.ZU;2-F
Abstract
CdSe/CdS superlattices were grown in the wurtzite crystal structure on a GaAs (111) substrate. Due to the strain-induced piezoelectric effec t in the individual CdS and CdSe layers it was possible to observe fir st-order folded acoustic phonons by measuring reflectance spectra at o blique incidence. First-order confined transversal (longitudinal) opti cal phonons were observed for CdS as well as for CdSe. Due to the larg e lattice mismatch of 3.9% a strain-induced shift of the detected conf ined phonon frequencies is observed.