Giant nonlinear emission in semiconductor microcavities

Summary form only given. In the late 1990s, the optical properties of microcavities containing semiconductor quantum wells have been the subject of detailed investigations. In the strong coupling regime that appears when the coupling frequency between the exciton and the cavity exceeds the decay rates of the exciton and of the photons in the cavity, the eigenstates of the system, the polariton modes, yield a doublet in the reflection or transmission spectrum of the system. We present new experimental results obtained under very weak laser excitation in an exciton-exciton scattering.