Abstract
We report on the resonant optical pumping of the spin states of a single Mn dopant in an quantum dot which is embedded in a charge tunable device. The experiment relies on a scheme of transitions reached when a suitable longitudinal magnetic field is applied. The optical pumping is achieved via the resonant excitation of the central system at the neutral exciton energy. For a specific gate voltage, the redshifted photoluminescence of the charged exciton is observed, which allows a nondestructive readout of the spin polarization. An arbitrary spin preparation in the or state characterized by a polarization near or above is evidenced.
- Received 18 July 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.197402
© 2011 American Physical Society