Electron-exciton scattering in a GaAs/AlAs bare quantum well and in a microcavity

G. Ramon, R. Rapaport, A. Qarry*, E. Cohen, A. Mann, A. Ron, L. N. Pfeiffer

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We report on a detailed study of the electron-exciton scattering in a GaAs quantum well (QW) with a variable density two-dimensional electron gas. Both a bare QW and a QW embedded in a GaAs/AlGaAs microcavity are studied by measuring the reflection linewidths of the bare excitons and the cavity polaritons as a function of photoexcitation intensity, temperature, and a perpendicularly applied magnetic field. This field induces the formation of charged polaritons at temperatures higher than the range of the charged exciton binding energy. The bare exciton linewidth dependence on electron density shows a transition when the electron gas transforms from classical to degenerate state. The lowest polariton linewidth dependence on electron gas and detuning energy is explained by the overlap of the cavity mode with the asymmetric exciton lineshape.

Original languageAmerican English
Pages (from-to)447-451
Number of pages5
JournalPhysica Status Solidi (A) Applied Research
Issue number2
StatePublished - Apr 2002
Externally publishedYes
Event7th International Conference on Optics and Excitons in Confined Systems - Montpellier, France
Duration: 3 Sep 20017 Sep 2001


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