  We consider the optical properties of a single magnetic impurity in a
self-assembled quantum dot. We show that using the resonant pumping one can
address and manipulate selectively individual spin states of a magnetic
impurity. The mechanisms of resonant optical polarization of a single impurity
in a quantum dot involve anisotropic exchange interactions and are different to
those in diluted semiconductors. A Mn impurity can act as qubit. The limiting
factors for the qubit manipulation are the electron-hole exchange interaction
and finite temperature.
