Charged excitons and cavity polaritons

When a quantum well containing a low density two-dimensional electron gas i s embedded in a microcavity, the photoexcited charged excitons that interac t with the confined photons form charged polaritons, The objective of this paper is to describe the experimental spectroscopic evidence for the appear ance of charged microcavity polaritons, and the analysis of their energy an d oscillator strength dependence on the 2DEG density. Then, the model calcu lations are extended to predict that the charged polaritonic signal can be electrically drifted in the QW plane over measurable distances.