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The optically induced spin dynamics of a single Mn atom embedded into asingle semiconductor quantum dot can be strongly influenced by using theoptical Stark effect. The exchange interaction gives rise to simultaneous spinflips between the quantum dot electron and Mn. In the time domain these flipscorrespond to exchange induced Rabi oscillations, which are typicallyoff-resonant. By applying a detuned laser pulse, the states involved in theflipping can be brought into resonance by means of the optical Stark effectincreasing the amplitude of the Rabi oscillations to one. In this paper westudy theoretically how this spin dynamics can be monitored in time-resolvedspectroscopy. In the spectrum the exchange interaction leads to a splitting ofthe exciton line into six lines, each corresponding to one of the six Mn spinstates. The dynamical behavior of the Mn spin is reflected by the strength ofthe individual lines as a function of time. When an off-resonant optical pulseis applied the spectral positions of the lines shift, but still the flippingdynamics is visible.

Optical signals of spin switching using the optical Stark effect in a Mn doped quantum dot