Quochi, F.Saba, M.Ciuti, C.Oesterle, U.Staehli, J. L.Deveaud, B.Bongiovanni, G.Mura, A.2007-08-312007-08-312007-08-31200010.1002/1521-3951(200009)221:1<127::AID-PSSB127>3.0.CO;2-Yhttps://infoscience.epfl.ch/handle/20.500.14299/11375WOS:0000897880000232707The coherent optical response of high quality microcavities containing quantum wells is investigated. The dynamics of the ac Stark effect is investigated by degenerate pump-probe experiments, by exciting the quantum well excitons at various intensities and detunings. The evolution from a simple dynamical excitonic Stark shift to a splitting is dearly observed, even when the excitation is degenerate with the continuum states. The experimental results agree well with the predictions of a theoretical model based on the semiconductor Maxwell-Bloch equations.SEMICONDUCTOR MICROCAVITIESDRIVENRESONANCEGAINtext::journal::journal article::research article