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arXiv · 1109.0876

Optical pumping and non-destructive readout of a single magnetic impurity spin in an InAs/GaAs quantum dot

Emmanuel Baudin·Emile Benjamin·Aristide Lemaître·Olivier Krebs
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Abstract

We report on the resonant optical pumping of the |\pm1> spin states of a single Mn dopant in an InAs/GaAs quantum dot embedded itself in a charge tuneable device. The experiment relies on a "W" scheme of transitions reached when a suitable longitudinal magnetic field is applied. The optical pumping is achieved via the resonant excitation of the central {\Lambda} system at the neutral exciton X0 energy. For a specific gate voltage, the red-shifted photoluminescence of the charged exciton X- is observed, which allows non-destructive readout of the spin polarization. An arbitrary spin preparation in the |+1> or |-1> state characterized by a polarization near or above 50% is evidenced.

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Emmanuel Baudin, Emile Benjamin, Aristide Lemaître, Olivier Krebs. 2011-09-05. Optical pumping and non-destructive readout of a single magnetic impurity spin in an InAs/GaAs quantum dot. https://doi.org/10.1103/physrevlett.107.197402

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