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 |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 70 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2004 Aug 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Relative strength of the screened Coulomb interaction and phase-space filling on exciton bleaching in multiple quantum well structures. / Choi, Moongoo; Je, Koo Chul; Yim, Sang Youp; Park, Seung Han.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 8, 01.08.2004.Research output: Contribution to journal › Article
TY - JOUR
T1 - Relative strength of the screened Coulomb interaction and phase-space filling on exciton bleaching in multiple quantum well structures
AU - Choi, Moongoo
AU - Je, Koo Chul
AU - Yim, Sang Youp
AU - Park, Seung Han
PY - 2004/8/1
Y1 - 2004/8/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.70.085309
DO - 10.1103/PhysRevB.70.085309
M3 - Article
VL - 70
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 8
ER -