Observation of spin beats at the Rabi frequency in microcavities

Abstract

Rabi oscillations are observed in the optically induced time-resolved Faraday rotation from a strong-coupling microcavity. They reveal the dynamics of the excitonic part of the polariton state, including the spin related information. The oscillations of the same period are observed at both circular and linear pumping, suggesting the splitting of the ground polariton state into a linearly polarized doublet.