Relative strength of the screened Coulomb interaction and phase-space filling on exciton bleaching in multiple quantum well structures

被引：11

作者：

Choi, M ^{[1
]}

Je, KC ^{[1
]}

Yim, SY ^{[1
]}

Park, SH ^{[1
]}

机构：

[1] Yonsei Univ, Natl Res Lab Nonlinear Opt, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.70.085309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：085309 / 1

页数：4

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