Micropillar Cavity Containing a CdTe Quantum Dot with a Single Manganese Ion

We report on the method of fabrication of a photonic microstructure that contains a single magnetic ion. Exactly one manganese ion was introduced into a self-assembled CdTe quantum dot, which was located in a ZnTe based micropillar cavity. The multistep fabrication procedure includes molecular beam epitaxy growth, optical characterization, and focused ion beam etching. Realization of the structure was confirmed by the observation of spectroscopic exciton lines split by six due to the exchange interaction with a manganese ion. The cavity mode was tuned to the quantum dot emission energy by a variation of the temperature. The presented technology is developed to be applied in optoelectronics based on solitary dopants.