Physics – Condensed Matter – Materials Science
Scientific paper
2007-08-17
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.77.121301
We demonstrate that the interaction between excitons and a sea of incoherent electrons does not preclude excitons dressing by light. We investigate the role of exciton-electron scattering in the light dressing by measuring the dynamical absorption spectrum of a modulation-doped CdTe quantum well, which shows a clear evidence for significant electron scattering of the excitonic states. We show the occurrence of dressed and correlated excitons by detecting quantum coherent interferences through excitonic Autler-Townes doublet and ac Stark splitting, which evolves to Mollow triplet with gain. We also evidence the partial inhibition of the electron-exciton scattering by exciton-light coupling.
Berney Jean
Deveaud Benoit
Portella-Oberli Marcia T.
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