Optical Pumping and a Nondestructive Readout of a Single Magnetic Impurity Spin in an InAs/GaAs Quantum Dot

E. Baudin, E. Benjamin, A. Lemaître, and O. Krebs
Phys. Rev. Lett. 107, 197402 – Published 31 October 2011

Abstract

We report on the resonant optical pumping of the |±1 spin states of a single Mn dopant in an InAs/GaAs quantum dot which is embedded in a charge tunable 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 redshifted photoluminescence of the charged exciton X is observed, which allows a nondestructive 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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  • Received 18 July 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.197402

© 2011 American Physical Society

Authors & Affiliations

E. Baudin, E. Benjamin, A. Lemaître, and O. Krebs

  • CNRS-Laboratoire de Photonique et de Nanostructures, Route de Nozay, 91460 Marcoussis, France

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Issue

Vol. 107, Iss. 19 — 4 November 2011

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