论文标题
纳米级零场电子自旋共振光谱法
Nanoscale zero-field electron spin resonance spectroscopy
论文作者
论文摘要
电子自旋共振（ESR）光谱在物理，化学和生物学中具有广泛的应用。作为互补工具，已经提出了数十年的零场ESR（ZF-ESR）光谱法，并显示出其自身的好处，以研究电子细和超精细相互作用。但是，由于低灵敏度和比常规ESR的样本更大的样品的要求很少使用ZF-ESR方法。在这项工作中，我们提出了一种通过使用高敏感的量子传感器（钻石中的氮 - 胶囊中心）在纳米级部署ZF-ESR光谱的方法。我们还测量了钻石中几个P1中心的纳米级ZF-ESR光谱，并表明可以直接从光谱中提取超精细耦合常数。这种方法为ZF-ESR光谱法实用的应用打开了大门，例如研究自旋修饰有机和生物系统中的结构和极性信息。
Electron spin resonance (ESR) spectroscopy has broad applications in physics, chemistry and biology. As a complementary tool, zero-field ESR (ZF-ESR) spectroscopy has been proposed for decades and shown its own benefits for investigating the electron fine and hyperfine interaction. However, the ZF-ESR method has been rarely used due to the low sensitivity and the requirement of much larger samples than conventional ESR. In this work, we present a method for deploying ZF-ESR spectroscopy at the nanoscale by using a highly sensitive quantum sensor, the nitrogen-vacancy center in diamond. We also measure the nanoscale ZF-ESR spectrum of a few P1 centers in diamond, and show that the hyperfine coupling constant can be directly extracted from the spectrum. This method opens the door to practical applications of ZF-ESR spectroscopy, such as investigation of the structure and polarity information in spin-modified organic and biological systems.
