Dynamic polarization of single nuclear spins by optical pumping of nitrogen-vacancy color centers in diamond at room temperature.
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.
Jacques
V
V
3. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany. v.jacques@physik.uni-stuttgart.de
Neumann
P
P
Beck
J
J
Markham
M
M
Twitchen
D
D
Meijer
J
J
Kaiser
F
F
Balasubramanian
G
G
Jelezko
F
F
Wrachtrup
J
J