TY - JOUR
T1 - Electron-exciton scattering in a GaAs/AlAs bare quantum well and in a microcavity
AU - Ramon, G.
AU - Rapaport, R.
AU - Qarry, A.
AU - Cohen, E.
AU - Mann, A.
AU - Ron, A.
AU - Pfeiffer, L. N.
PY - 2002/4
Y1 - 2002/4
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0036544183&partnerID=8YFLogxK
U2 - 10.1002/1521-396X(200204)190:2<447::AID-PSSA447>3.0.CO;2-C
DO - 10.1002/1521-396X(200204)190:2<447::AID-PSSA447>3.0.CO;2-C
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AN - SCOPUS:0036544183
SN - 0031-8965
VL - 190
SP - 447
EP - 451
JO - Physica Status Solidi (A) Applied Research
JF - Physica Status Solidi (A) Applied Research
IS - 2
T2 - 7th International Conference on Optics and Excitons in Confined Systems
Y2 - 3 September 2001 through 7 September 2001
ER -