title: Dynamic polarization of single nuclear spins by optical pumping of nitrogen-vacancy color centers in diamond at room temperature.
abstract: We report a versatile method to polarize single nuclear spins in diamond, based on optical pumping of a single nitrogen-vacancy (NV) defect and mediated by a level anticrossing in its excited state. A nuclear-spin polarization higher than 98% is achieved at room temperature for the 15N nuclear spin associated with the NV center, corresponding to microK effective nuclear-spin temperature. We then show simultaneous initialization of two nuclear spins in the vicinity of 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.
authors.affiliation: 3. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany. v.jacques@physik.uni-stuttgart.de
authors.forename: V
authors.initials: V
authors.lastname: Jacques
authors.forename: P
authors.initials: P
authors.lastname: Neumann
authors.forename: J
authors.initials: J
authors.lastname: Beck
authors.forename: M
authors.initials: M
authors.lastname: Markham
authors.forename: D
authors.initials: D
authors.lastname: Twitchen
authors.forename: J
authors.initials: J
authors.lastname: Meijer
authors.forename: F
authors.initials: F
authors.lastname: Kaiser
authors.forename: G
authors.initials: G
authors.lastname: Balasubramanian
authors.forename: F
authors.initials: F
authors.lastname: Jelezko
authors.forename: J
authors.initials: J
authors.lastname: Wrachtrup