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

Moongoo Choi, Koo Chul Je, Sang Youp Yim, Seung Han Park

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 languageEnglish
Pages (from-to)085309-1-085309-4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number8
DOIs
Publication statusPublished - 2004 Aug 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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