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

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 Λ 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.

11 pages, 3 figures

References in corpus (5)

• Optically probing the fine structure of a single Mn atom in an InAs quantum dot
• Robust quantum dot state preparation via adiabatic passage with frequency-swept optical pulses
• Controlling the Interaction of Electron and Nuclear Spins in a Tunnel-Coupled Quantum Dot
• Single exciton spectroscopy of single-Mn doped InAs quantum dots
• Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule

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