论文标题
在零磁场处的单氮中心的Kilohertz电子顺磁共振光谱
Kilohertz electron paramagnetic resonance spectroscopy of single nitrogen centers at zero magnetic field
论文作者
论文摘要
电子顺磁共振光谱（EPR）是物理，化学和生物学中最重要的分析工具之一。即使在环境条件下，也可以将这种技术促进到单旋转水平，从而将这种技术促进了这种技术，但在钻石中的氮呈（NV）中心的出现。尽管空间分辨率取得了巨大进展，但当前的Megahertz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旋转的短相干时间。在这里，我们通过在不同对称的状态之间采用磁性噪声不敏感的过渡来应对这一挑战。我们证明了钻石中的单个替代氮（P1）中心的较窄范围较窄，有几千期的线宽，然后可以解决一些弱耦合。这些结果表明基于NV中心的EPR的空间和光谱进展，并在单分子水平上提供了分析（EPR）光谱的途径。
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.
