Abstract
We report on a strong modulation of the resonantly excited (e1:hh1)1S exciton photoluminescence and LO-phonon Raman scattering by an additional, weak, above-gap radiation at low temperatures. These effects are attributed to the interaction between excitons and cold, free carriers (in the e-h pair density range of 105<n<107 cm-2) that causes an exciton population redistribution and an increased dephasing rate. The analysis indicates that localized and delocalized exciton states span the same spectral range. It also yields the spectral dependence of the additional exciton dephasing that is due to the interaction with free carriers.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1938-1941 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 51 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1995 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics