Abstract
The intraband optical properties of quantum dots comprising one electron and up to two Mn ions, subjected to an axial magnetic field, have been investigated theoretically using the configuration-interaction method. We have shown that the electron-Mn and the $\mathrm{Mn}\text{\ensuremath{-}}\mathrm{Mn}$ exchange interaction mechanisms induce splitting of the energy levels for zero magnetic field, and lead to ground-state transitions and anticrossing of the states for finite magnetic fields. This results in the presence of interesting effects in the intraband absorption spectrum, such as the appearance of new absorption lines and anticrossing features, absent in the single-particle spectrum. Our analysis predicts that both the electron--Mn ion and the $\mathrm{Mn}\text{\ensuremath{-}}\mathrm{Mn}$ exchange interactions may be probed by means of intraband magneto-optical spectroscopy.
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