Abstract
By perturbation theory it is demonstrated that elongated island structures in submonolayers of AlAs inserted into GaAs/AlAs quantum wells cause anisotropies in the optical-polarization spectra. Therefore, measured optical anisotropies alone do not furnish sufficient proof of lateral quantum confinement. Ordering the islands into even a very imperfect grid structure significantly enhances the magnitude of the optical anisotropies when the grid spacing and the quantum-well width are chosen appropriately.
Original language | English |
---|---|
Pages (from-to) | 5562-5567 |
Number of pages | 6 |
Journal | Physical Review B |
Volume | 44 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1991 Jan 1 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics