Separation of screened Coulomb interaction and phase-space filling in exciton bleaching of multiple quantum wells

Koo Chul Je; Moongoo Choi; Sang Youp Yim; Jeung Sun Ahn; Seung Han Park

doi:10.1103/PhysRevB.66.155312

Separation of screened Coulomb interaction and phase-space filling in exciton bleaching of multiple quantum wells

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Excitonic nonlinearity in multiple quantum wells due to many-body interactions consisting of phase-space filling and screened Coulomb interaction is investigated. In particular, we show that the effects of the screened Coulomb interaction and the phase-space filling on the exciton bleaching can be separated for highly excited carrier densities by femtosecond pump pulses. We also find that the phase-space filling effects on the excitonic bleaching are about three times larger than the effects of screened Coulomb interaction and gradually decreases with increasing carrier density within the Mott density.

Original language	English
Article number	155312
Pages (from-to)	1553121-1553125
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.66.155312
Publication status	Published - 2002 Oct 15

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.66.155312

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abstract = "Excitonic nonlinearity in multiple quantum wells due to many-body interactions consisting of phase-space filling and screened Coulomb interaction is investigated. In particular, we show that the effects of the screened Coulomb interaction and the phase-space filling on the exciton bleaching can be separated for highly excited carrier densities by femtosecond pump pulses. We also find that the phase-space filling effects on the excitonic bleaching are about three times larger than the effects of screened Coulomb interaction and gradually decreases with increasing carrier density within the Mott density.",

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AU - Choi, Moongoo

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AU - Ahn, Jeung Sun

AU - Park, Seung Han

PY - 2002/10/15

Y1 - 2002/10/15

N2 - Excitonic nonlinearity in multiple quantum wells due to many-body interactions consisting of phase-space filling and screened Coulomb interaction is investigated. In particular, we show that the effects of the screened Coulomb interaction and the phase-space filling on the exciton bleaching can be separated for highly excited carrier densities by femtosecond pump pulses. We also find that the phase-space filling effects on the excitonic bleaching are about three times larger than the effects of screened Coulomb interaction and gradually decreases with increasing carrier density within the Mott density.

AB - Excitonic nonlinearity in multiple quantum wells due to many-body interactions consisting of phase-space filling and screened Coulomb interaction is investigated. In particular, we show that the effects of the screened Coulomb interaction and the phase-space filling on the exciton bleaching can be separated for highly excited carrier densities by femtosecond pump pulses. We also find that the phase-space filling effects on the excitonic bleaching are about three times larger than the effects of screened Coulomb interaction and gradually decreases with increasing carrier density within the Mott density.

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Separation of screened Coulomb interaction and phase-space filling in exciton bleaching of multiple quantum wells

Abstract

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