Dynamic nuclear polarization of ensemble of nuclear spins in diamond
Ran Fischer1, Andrey Jarmola2, Pauli Kehayias2, Dmitry Budker2, 3
1Department of Physics, Technion – Israel Institute of Technology, Haifa 32000, Israel
2Department of Physics, University of California, Berkeley, California 94720-7300, USA
3Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Nuclear spins are a natural choice for various applications requiring long relaxation times, due to their highly localized wave-function which causes a small interaction with the environment. Examples for such applications are vast, among them are bio-sensing using NMR, different kinds of metrology and building blocks for quantum computers. Still, polarization of nuclear spins poses a challenge on every application that involves manipulation of nuclear spin. A method of polarization of single nuclear spins in diamond was suggested in  and demonstrated with nuclear spins of 15N, 14N and 13C [1, 2] . The method, applicable at room temperature, is based on the transfer of the polarization of electronic spins of NV- color centers to the nuclear spin at the excited-state level anti-crossing (ESLAC) of the center.