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  • Title: Polarization and readout of coupled single spins in diamond.
    Author: Hanson R, Mendoza FM, Epstein RJ, Awschalom DD.
    Journal: Phys Rev Lett; 2006 Aug 25; 97(8):087601. PubMed ID: 17026336.
    Abstract:
    We study the coupling of a single nitrogen-vacancy center in diamond to a nearby single nitrogen defect at room temperature. The magnetic dipolar coupling leads to a splitting in the electron spin resonance frequency of the nitrogen-vacancy center, allowing readout of the state of a single nitrogen electron spin. At magnetic fields where the spin splitting of the two centers is the same, we observe a strong polarization of the nitrogen electron spin. The amount of polarization can be controlled by the optical excitation power. We combine the polarization and the readout in time-resolved pump-probe measurements to determine the spin relaxation time of a single nitrogen electron spin. Finally, we discuss indications for hyperfine-induced polarization of the nitrogen nuclear spin.
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