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We investigate theoretically the spectral and dynamical effects of theshort-range exchange interaction between a single manganese (Mn) atom hosted bycylindrical CdTe quantum dots and its light-hole excitons or biexcitons. Ourapproach is based on the Kohn-Luttinger KP theory and configuration interactionmethod, the dynamics of the system in the presence of intraband relaxationbeing derived from the von Neumann-Lindblad equation. The complex structure ofthe light-hole exciton absorption spectrum reveals the exchange-induced excitonmixing and depends strongly on the Mn position. In particular, if the Mn atomis closer to the edges of the cylinder the bright and dark light-hole excitonsare mixed by the hole-Mn exchange alone. Consequently, their populationsexhibit exchange-induced Rabi oscillations which can be viewed as opticalsignatures of light-hole spin reversal. Similar results are obtained for mixedbiexcitons, in this case the exchange-induced Rabi oscillations being damped bythe intraband hole relaxation processes. The effect of light-hole heavy-holemixing is also discussed.

Light-hole exciton mixing and dynamics in Mn-doped quantum dots