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Reiter, Doris ; Kuhn, Tilmann ; Axt, Vollrath Martin:
Coherent control of a single Mn spin in a quantum dot via optical manipulation of the light hole exciton.
In: Physical Review B.
Bd. 83
(2011)
Heft 15
.
- 155322.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.83.155322
Abstract
Due to the strong exchange interaction between a single Mn spin embedded in a single semiconductor quantum dot and the quantum dot exciton, the spin state of the Mn atom can be controlled via optical manipulation of the exciton. When the hole of the exciton is of light hole type, both electron and hole can induce spin flips and thus change the Mn spin. We propose switching protocols to selectively address the Mn spin states. Depending on the polarization of the laser pulses the Mn spin can be switched by different switching schemes into all eigenstates. In contrast to previous studies involving heavy holes, we can find faster and more stable switching sequences. We discuss in detail the absorption spectrum of the lowest light hole exciton transition, which is strongly modified by the presence of the Mn spin. Furthermore, we show that spectrally resolved pump-probe measurements provide a suitable technique to monitor the Mn spin dynamics.