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- Title
Above-barrier excitons: first magnetooptic investigation.
- Authors
Vladimirova, M. R.; Kavokin, A. V.; Kaliteevskiı, M. A.; Kokhanovskiı, S. I.; Sasin, M. É.; Seısyan, R. P.
- Abstract
An above-barrier localized excitonic state in a Bragg confining semiconductor superstructure based on an (In, Ga)As/GaAs heterosystem is observed experimentally. A sharp excitonic resonance corresponding to the interference mechanism of localization is observed in the absorption spectrum of this structure at 1.548 eV, i.e., 33 meV above the energy of a bulk exciton in GaAs. The oscillator strength of the above-barrier exciton is twice that of the main excitonic state in the system, and the above-barrier exciton gives rise to sharp Landau oscillations in the magnetoabsorption spectra.
- Subjects
EXCITON theory; MAGNETOOPTICS
- Publication
JETP Letters, 1999, Vol 69, Issue 10, p779
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.568090