利用光泵浦氮空位中心对强极化弱耦合的(13)C核自旋进行极化

Strongly polarizing weakly coupled (13)C nuclear spins with optically pumped nitrogen-vacancy center.

作者信息

Wang Ping, Liu Bao, Yang Wen

机构信息

Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.

Beijing Computational Science Research Center, Beijing 100094, China.

出版信息

Sci Rep. 2015 Nov 2;5:15847. doi: 10.1038/srep15847.

DOI:10.1038/srep15847

PMID:26521962

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4629148/

Abstract

Enhancing the polarization of nuclear spins surrounding the nitrogen-vacancy (NV) center in diamond has recently attracted widespread attention due to its various applications. Here we present an analytical formula that not only provides a clear physical picture for the recently observed polarization reversal of strongly coupled(13)C nuclei over a narrow range of magnetic field [H. J. Wang et al., Nat. Commun. 4, 1940 (2013)], but also demonstrates the possibility to strongly polarize weakly coupled (13)C nuclei. This allows sensitive magnetic field control of the (13)C nuclear spin polarization for NMR applications and significant suppression of the (13)C nuclear spin noise to prolong the NV spin coherence time.

摘要

由于其多种应用，增强金刚石中氮空位（NV）中心周围核自旋的极化最近引起了广泛关注。在此，我们提出了一个解析公式，它不仅为最近在窄磁场范围内观察到的强耦合(^{13}C)核的极化反转提供了清晰的物理图像[H. J. Wang等人，《自然·通讯》4, 1940 (2013)]，而且还证明了使弱耦合(^{13}C)核实现强极化的可能性。这使得在核磁共振应用中能够对(^{13}C)核自旋极化进行灵敏的磁场控制，并显著抑制(^{13}C)核自旋噪声以延长NV自旋相干时间。