Polarization and readout of coupled single spins in diamond

Details Polarization and readout of coupled single spins in diamond Polarization and readout of coupled single spins in diamond

2006-05-20

arxiv.org/abs/quant-ph/0605179v2

Phys. Rev. Lett. 97, 087601 (2006)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.97.087601

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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