Abstract
We investigate the effect of resonantly excited excitons on the bleaching of n=1 and n=2 heavy-hole (hh) exciton resonances in GaAs multiple-quantum-well structures by using a pump-probe spectroscopic technique at low temperature under quasi-stationary excitation conditions. In particular, we present direct observation of long-range Coulomb screening by two-dimensional exciton-exciton interactions along with the unambiguous discrimination of screened Coulomb interaction and phase-space filling on the n=1 hh exciton bleaching. In addition, we find that the strength of long-range Coulomb screening on the n=1 hh exciton bleaching is only two to three times weaker than that of the phase-space filling at 10 K.
| Original language | English |
|---|---|
| Pages (from-to) | 085309-1-085309-4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 70 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2004 Aug 1 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Choi, M., Je, K. C., Yim, S. Y., & Park, S. H. (2004). Relative strength of the screened Coulomb interaction and phase-space filling on exciton bleaching in multiple quantum well structures. Physical Review B - Condensed Matter and Materials Physics, 70(8), 085309-1-085309-4. https://doi.org/10.1103/PhysRevB.70.085309