Exciton polariton emission enhancement in semiconductor microcavities containing an optically induced electron gas

We present a study of a microcavity polariton system in the presence of an optically induced electron gas. Angle resolved photoluminescence measurements with nonresonant excitation show enhanced emission from the k ≈ 0 states as the electron density is increased. This indicates that electron-polariton scattering can assist in relaxing the polariton bottleneck.