The threshold behavior of the stimulated parametric emission of dressed excitons in a microcavity is studied. The inelastic-phonon-scattering rates of the dressed exciton are calculated and are shown to be smaller than the bare quantum-well exciton values. The results describe the recently observed thresholdless photoemission behavior and predict a large stability for the dressed exciton modes inside a quantum-well microcavity.

Physical review. B, Condensed matterMar 15, 199586 citations

Stimulated emission and optical gain in HgI2

Ida Maria Catalano, Aldo Cingolani, Michele Ferrara +2 more

Stimulated emission in HgI2 at 80 °K due to an exciton-electron collision cooperative process is reported. The line shape of the stimulated emission band depends on the excitation wavelength. High optical gain has been measured. These effects are observed both with one- and two-photon pumping.

Applied Physics LettersJan 1, 19786 citations