Abstract
The cw, linearly and circularly polarized photoluminescence excitation spectra (Plin and Pcir), are studied for (e1:hh1) excitons of undoped GaAs/AlxGa1-xAs quantum wells. Monitoring in the high-energy range of the luminescence, pronounced 1S and 2S polarization-preserving bands are observed. They are shown to be due to LA-phonon-assisted relaxation of delocalized excitons. For the low-energy range Plin∼0 and a circular polarization reversal is observed, resulting from exciton-exciton scattering.
Original language | English (US) |
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Pages (from-to) | 2803-2806 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 48 |
Issue number | 4 |
DOIs | |
State | Published - 1993 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics