Four wave mixing oscillation in a semiconductor microcavity: Generation   of two correlated polariton populations
  We demonstrate a novel kind of polariton four wave mixing oscillation. Two pump polaritons scatter towards final states that emit two beams of equal intensity, separated both spatially and in polarization with respect to the pumps. The measurement of the intensity fluctuations of the emitted light demonstrates that the final states are strongly correlated. 
Marco Romanelli (LKB - Jussieu), Charles Leyder (LKB - Jussieu),   Jean-Philippe Karr (LKB - Jussieu), Elisabeth Giacobino (...