Optical polarization of nuclear ensembles in diamond
Optical polarization of nuclear ensembles in diamond
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DOI：
10.1103/physrevb.87.125207
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发表时间：
2013-03-29
影响因子：
3.7
通讯作者：
Budker, Dmitry
中科院分区：
文献类型：
--
作者：
Fischer, Ran;Jarmola, Andrey;Budker, Dmitry
本文报道了金刚石中致密核自旋系综的极化及其对磁场和温度的依赖。极化方法是基于带负电荷的氮空位（NV）色中心的电子自旋极化通过中心的激发态反交叉转移到核自旋上。我们极化了NV中心内90%的N-14核自旋和近端70%的C-13核自旋，其超精细相互作用强度为13-14 MHz。极化的磁场依赖性表明，在与取代氮中心交叉弛豫对应的特定场值下，极化急剧下降，而极化的温度依赖性表明，高极化持续到50 K。这项工作使块状金刚石中C-13的极化成为可能，这对核磁共振、混合量子器件的量子存储和传感应用具有重要意义。DOI: 10.1103 / PhysRevB.87.125207
We report polarization of a dense nuclear-spin ensemble in diamond and its dependence on magnetic field and temperature. The polarization method is based on the transfer of electron spin polarization of negatively charged nitrogen vacancy (NV) color centers to the nuclear spins via the excited-state level anticrossing of the center. We polarize 90% of the N-14 nuclear spins within the NV centers, and 70% of the proximal C-13 nuclear spins with hyperfine interaction strength of 13-14 MHz. Magnetic-field dependence of the polarization reveals a sharp decrease in polarization at specific field values corresponding to cross relaxation with substitutional nitrogen centers, while temperature dependence of the polarization reveals that high polarization persists down to 50 K. This work enables polarization of the C-13 in bulk diamond, which is of interest in applications of nuclear magnetic resonance, in quantum memories of hybrid quantum devices, and in sensing. DOI: 10.1103/PhysRevB.87.125207