Details
| Original language | English |
|---|---|
| Pages (from-to) | 630-633 |
| Number of pages | 4 |
| Journal | Journal of Crystal Growth |
| Volume | 214 |
| Publication status | Published - 2 Jun 2000 |
| Externally published | Yes |
| Event | The 9th International Conference on II-VI Compounds - Kyoto, Jpn Duration: 1 Nov 1999 → 5 Nov 1999 |
Abstract
We demonstrate the mutual influence of the dynamics in the real-space and the spin parts of the exciton wavefunction evoked by the exchange interaction. In the regime of high exciton density, the exciton-exciton interaction in ZnSe/ZnMgSSe quantum wells is found to be strongly affected by the exciton spin orientation and the longitudinal spin relaxation via single-fermion spin flips. The exciton's homogeneous linewidth as deduced from degenerate four-wave mixing with prepulse is significantly enhanced in spin-pure exciton populations by scattering including fermionic exchange. The transverse spin relaxation in the low-density limit is deduced from the decay of spin quantum-beats in photoluminescence experiments. We find an anti-proportionality between the spin relaxation and the optical dephasing times. The temperature dependence of both relaxation times is determined by the exciton-phonon interaction. The latter gradually reduces the electron-hole exchange coupling which is the dominating term in the exciton's transverse spin relaxation.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Inorganic Chemistry
- Materials Science(all)
- Materials Chemistry
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In: Journal of Crystal Growth, Vol. 214, 02.06.2000, p. 630-633.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Spin relaxation and spin-dependent exciton interactions in ZnSe quantum wells
AU - Kalt, H.
AU - Hoffmann, J.
AU - Tröndle, D.
AU - Wachter, S.
AU - Lüerßen, D.
AU - Hägele, Daniel
AU - Rühle, W. W.
AU - Oestreich, Michael
AU - Blewett, I. J.
AU - Galbraith, I.
PY - 2000/6/2
Y1 - 2000/6/2
N2 - We demonstrate the mutual influence of the dynamics in the real-space and the spin parts of the exciton wavefunction evoked by the exchange interaction. In the regime of high exciton density, the exciton-exciton interaction in ZnSe/ZnMgSSe quantum wells is found to be strongly affected by the exciton spin orientation and the longitudinal spin relaxation via single-fermion spin flips. The exciton's homogeneous linewidth as deduced from degenerate four-wave mixing with prepulse is significantly enhanced in spin-pure exciton populations by scattering including fermionic exchange. The transverse spin relaxation in the low-density limit is deduced from the decay of spin quantum-beats in photoluminescence experiments. We find an anti-proportionality between the spin relaxation and the optical dephasing times. The temperature dependence of both relaxation times is determined by the exciton-phonon interaction. The latter gradually reduces the electron-hole exchange coupling which is the dominating term in the exciton's transverse spin relaxation.
AB - We demonstrate the mutual influence of the dynamics in the real-space and the spin parts of the exciton wavefunction evoked by the exchange interaction. In the regime of high exciton density, the exciton-exciton interaction in ZnSe/ZnMgSSe quantum wells is found to be strongly affected by the exciton spin orientation and the longitudinal spin relaxation via single-fermion spin flips. The exciton's homogeneous linewidth as deduced from degenerate four-wave mixing with prepulse is significantly enhanced in spin-pure exciton populations by scattering including fermionic exchange. The transverse spin relaxation in the low-density limit is deduced from the decay of spin quantum-beats in photoluminescence experiments. We find an anti-proportionality between the spin relaxation and the optical dephasing times. The temperature dependence of both relaxation times is determined by the exciton-phonon interaction. The latter gradually reduces the electron-hole exchange coupling which is the dominating term in the exciton's transverse spin relaxation.
UR - http://www.scopus.com/inward/record.url?scp=17744402010&partnerID=8YFLogxK
U2 - 10.1016/S0022-0248(00)00167-6
DO - 10.1016/S0022-0248(00)00167-6
M3 - Conference article
AN - SCOPUS:17744402010
VL - 214
SP - 630
EP - 633
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
T2 - The 9th International Conference on II-VI Compounds
Y2 - 1 November 1999 through 5 November 1999
ER -