Details
| Original language | English |
|---|---|
| Pages (from-to) | 27-32 |
| Number of pages | 6 |
| Journal | Physica Status Solidi (A) Applied Research |
| Volume | 178 |
| Issue number | 1 |
| Publication status | Published - 14 Jun 2000 |
| Externally published | Yes |
| Event | Optics of Excitons in Confined Systems (OECS-6) - Ascona, Switz Duration: 30 Aug 1999 → 2 Sept 1999 |
Abstract
We study the population of excitons in GaAs/AlGaAs quantum wells in the time span between optical excitation and optical recombination. We distinguish between 1s excitons and free electrons and holes by tracing the electron-hole exchange energy and thereby the overlap of electron and hole. The experiments prove that at many experimental conditions rather electrons and holes than 1s excitons are present during this time span although recombination takes place at the 1s exciton energy of free or localized excitons. The 1s exciton states are only populated under stringent experimental conditions.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica Status Solidi (A) Applied Research, Vol. 178, No. 1, 14.06.2000, p. 27-32.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Excitons, or no excitons, that is the question
AU - Oestreich, Michael
AU - Hägele, Daniel
AU - Hübner, Jens
AU - Rühle, W. W.
PY - 2000/6/14
Y1 - 2000/6/14
N2 - We study the population of excitons in GaAs/AlGaAs quantum wells in the time span between optical excitation and optical recombination. We distinguish between 1s excitons and free electrons and holes by tracing the electron-hole exchange energy and thereby the overlap of electron and hole. The experiments prove that at many experimental conditions rather electrons and holes than 1s excitons are present during this time span although recombination takes place at the 1s exciton energy of free or localized excitons. The 1s exciton states are only populated under stringent experimental conditions.
AB - We study the population of excitons in GaAs/AlGaAs quantum wells in the time span between optical excitation and optical recombination. We distinguish between 1s excitons and free electrons and holes by tracing the electron-hole exchange energy and thereby the overlap of electron and hole. The experiments prove that at many experimental conditions rather electrons and holes than 1s excitons are present during this time span although recombination takes place at the 1s exciton energy of free or localized excitons. The 1s exciton states are only populated under stringent experimental conditions.
UR - http://www.scopus.com/inward/record.url?scp=17544388443&partnerID=8YFLogxK
U2 - 10.1002/1521-396X(200003)178:1<27::AID-PSSA27>3.0.CO;2-X
DO - 10.1002/1521-396X(200003)178:1<27::AID-PSSA27>3.0.CO;2-X
M3 - Conference article
AN - SCOPUS:17544388443
VL - 178
SP - 27
EP - 32
JO - Physica Status Solidi (A) Applied Research
JF - Physica Status Solidi (A) Applied Research
SN - 0031-8965
IS - 1
T2 - Optics of Excitons in Confined Systems (OECS-6)
Y2 - 30 August 1999 through 2 September 1999
ER -