arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2005.14718quant-ph
收藏

零磁场下氮单心的千赫电子顺磁共振谱

Kilohertz electron paramagnetic resonance spectroscopy of single nitrogen centers at zero magnetic field

Fei Kong, Pengju Zhao, Pei Yu, Zhuoyang Qin, Zhehua Huang, Zhecheng Wang, Mengqi Wang, Fazhan Shi, Jiangfeng Du

摘要:

电子顺磁共振波谱(EPR)是物理、化学和生物学中最重要的分析工具之一。金刚石中氮空位(NV)中心的出现,作为一个原子大小的磁力计,已经将这种技术提升到单自旋水平,即使在环境条件下。尽管在空间分辨率方面取得了巨大的进步,但目前的兆赫光谱分辨率仍然不足以解决关键的异质分子信息。一个主要的挑战是样品电子自旋的短相干时间。在这里,我们通过采用不同对称性的状态之间的磁噪声不敏感的过渡来解决这一挑战。我们证明了金刚石中单取代氮(P1)中心的谱线窄了27倍,线宽为几千赫兹,从而可以分辨出一些弱耦合。这些结果显示了基于NV中心的EPR在空间和光谱上的进步,并提供了一条通往单分子水平分析(EPR)光谱的途径。

英文摘要:

Electron paramagnetic resonance spectroscopy (EPR) is among the most important analytical tools in physics, chemistry, and biology. The emergence of nitrogen-vacancy (NV) centers in diamond, serving as an atomic-sized magnetometer, has promoted this technique to single-spin level, even under ambient conditions. Despite the enormous progress in spatial resolution, the current megahertz spectral resolution is still insufficient to resolve key heterogeneous molecular information. A major challenge is the short coherence times of the sample electron spins. Here, we address this challenge by employing a magnetic noise-insensitive transition between states of different symmetry. We demonstrate a 27-fold narrower spectrum of single substitutional nitrogen (P1) centers in diamond with linewidth of several kilohertz, and then some weak couplings can be resolved. Those results show both spatial and spectral advances of NV center-based EPR, and provide a route towards analytical (EPR) spectroscopy at single-molecule level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑