Negatively charged quantum well polaritons in a GaAs/AlAs microcavity: An analog of atoms in a cavity
The negatively charged exciton (X-) is observed to strongly couple with the microcavity- (MC-)confined photons in a GaAs quantum well containing a two-dimensional electron gas with 0<n(e)</=3x10(10) cm(-2). This strong coupling results in a formation of charged polaritons. The coupling strength is found to depend on sqrt[n(e)], in analogy to two-level atoms in a cavity. The analysis of the reflection and photoluminescence spectra shows that X- is strongly admixed with the neutral exciton via their coupling with the MC photons. The linewidth dependence on n(e) indicates that electron-polariton scattering is effective.
Rapaport
R
Solid State Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Harel
R
Cohen
E
Ron
A
Linder
E
Pfeiffer
LN