Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature

Abstract

We report a versatile method to efficiently polarize single nuclear spins in diamond, which is based on optical pumping of a single NV color center and mediated by a level-anti crossing in its excited state. A nuclear spin polarization higher than 98% is achieved at room temperature for the 15N nuclear spin associated to the NV center, corresponding to $\mu$K effective nuclear spin temperature. We then show simultaneous deterministic initialization of two nuclear spins (13C and 15N) in close vicinity to a NV defect. Such robust control of nuclear spin states is a key ingredient for further scaling up of nuclear-spin based quantum registers in diamond.

4 pages, 4 figures

References in corpus (2)

• Excited-state spectroscopy using single-spin manipulation in diamond
• Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance

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