Abstract
The coherent optical control of polariton modes is studied in time-resolved pulse-transmission experiments on a $\mathrm{ZnSe}∕\mathrm{ZnSSe}$ heterostructure. Using a phase-locked pulse pair at low excitation intensity it is shown that the polariton modes, their quantum beat structure, and the radiative decay can be coherently manipulated. Calculations based on a microscopic polariton theory can explain the measured findings without the use of fit parameters. Additionally, the decay times of the coherent polarization, which depend on the involved polariton modes and their radiative decay, are extracted on the basis of a phenomenological model.
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