| Numéro |
J. Phys. Colloques
Volume 46, Numéro C7, Octobre 1985
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
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|---|---|---|
| Page(s) | C7-167 - C7-171 | |
| DOI | https://doi.org/10.1051/jphyscol:1985732 | |
Fifth International Conference on Dynamical Processes in the Excited States of Solids / Dynamique des Etats Excités dans les Solides
J. Phys. Colloques 46 (1985) C7-167-C7-171
DOI: 10.1051/jphyscol:1985732
1 Max-Planck-Institut für Festkörperforschung, Heisenbergstr.1, D-7000 Stuttgart-80, F.R.G.
2 AT&T Bell Laboratories, Murray Hill, N.J. 07974, U.S.A.
J. Phys. Colloques 46 (1985) C7-167-C7-171
DOI: 10.1051/jphyscol:1985732
PHASE COHERENCE OF 2D EXCITONS IN GaAs-AlGaAs QUANTUM WELLS
L. Schultheis1 et J. Hegarty21 Max-Planck-Institut für Festkörperforschung, Heisenbergstr.1, D-7000 Stuttgart-80, F.R.G.
2 AT&T Bell Laboratories, Murray Hill, N.J. 07974, U.S.A.
Abstract
We have studied photon echoes on a picosecond timescale from 2D excitons in GaAs-AlGaAs quantum wells. A theoretical model is used which considers phase relaxation during excitation. We find considerable deviations from the usual photon echo behavior for pulse lengths comparable to the phase coherence time. Line shape analyses of our experimental data yield the phase coherence times which are found to vary strongly across the inhomogeneously broadened exciton line.