R. Rapaport et al., Free electron effects on the cavity polariton linewidth in an AlAs/AlGaAs microcavity containing a two-dimensional electron gas, SOL ST COMM, 120(9-10), 2001, pp. 387-391
We report on an experimental Study of the microcavity polariton linewidth i
n an AlAs/AlGaAs microcavity containing GaAs quantum wells (QW) in which a
variable density electron gas is photogenerated. The linewidth of the lowes
t polariton branch shows a clear suppression while that of the other branch
es show enhancement at narrow detuning energy ranges. A transformation is o
bserved from a strong to weak exciton-cavity, mode coupling at a very low p
hotoexcitation intensity. (C) 2001 Published by Elsevier Science Ltd.