Magneto-optical properties of CdTe quantum wells with ternary MgMnTe and quaternary CdMnMgTe barriers

Citation
S. Mackowski et al., Magneto-optical properties of CdTe quantum wells with ternary MgMnTe and quaternary CdMnMgTe barriers, THIN SOL FI, 367(1-2), 2000, pp. 223-226
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
THIN SOLID FILMS
ISSN journal
00406090 → ACNP
Volume
367
Issue
1-2
Year of publication
2000
Pages
223 - 226
Database
ISI
SICI code
0040-6090(20000515)367:1-2<223:MPOCQW>2.0.ZU;2-#
Abstract
Optical properties of the CdTe single quantum wells with barriers made eith er of ternary MnMgTe or quaternary CdMnMgTe compounds were investigated by use of photoluminescence and reflectivity spectroscopy as a function of mag netic field. The samples were grown by molecular beam epitaxy. Optical spec tra are characterized by small linewidths and small Stokes shifts pointing at a high quality of the structures. Apart from the features related to con fined excitons, also a line, attributed to donor bound excitons, is observe d in majority of the spectra. The use of quaternary material to make barrie rs with a constant value of Mn molar fraction made possible, by varying the ratio of Cd to Mg molar fractions, fabrication of structures with the dept h of the confining potential adjustable while remaining magnetically unchan ged. On the other hand by varying the ratio of Mn to Mg contents we could a ffect magnetic properties of these structures without changing the potentia l depth in the absence of a magnetic field. From the magnetic field depende nce of the photoluminescence we found that the free- to bound exciton-relat ed emission intensity ratio strongly depended on the quantum well width as well as on the magnetic ion content in the barriers. (C) 2000 Elsevier Scie nce S.A. All rights reserved.