Saba, M.Quochi, F.Ciuti, C.Oesterle, U.Staehli, J. L.Deveaud, B.Bongiovanni, G.Mura, A.2007-08-312007-08-312007-08-31200010.1103/PhysRevLett.85.385https://infoscience.epfl.ch/handle/20.500.14299/11379WOS:0000880487000402677Pump-probe measurements in a microcavity containing a quantum well show that a population of circularly polarized (sigma(+)) excitons can completely inhibit the transition to sigma(-) one-exciton states by transferring the oscillator strength to the biexcitonic resonance. With increasing pump intensity the linear exciton-polariton doublet evolves into a triplet polariton structure and finally into a shifted biexciton-polariton doublet. A theoretical model of interacting excitons demonstrates that the crossover from exciton to biexciton polaritons is driven by three-exciton Coulomb correlation.QUANTUM-WELLSOPTICSREGIMEGAStext::journal::journal article::research article