论文标题
电荷状态动力学和光学检测到的电子自旋共振对比度的浅氮脱粒中心的对比度
Charge State Dynamics and Optically Detected Electron Spin Resonance Contrast of Shallow Nitrogen-Vacancy Centers in Diamond
论文作者
论文摘要
钻石中的氮呈（NV）中心可用于具有原子分辨率和灵敏度的纳米级传感。但是，已经观察到它们的性质在接近钻石表面时降低。在这里，我们报告说，除了降解的自旋相干性外，表面纳米内的NV中心还可以显示出光学检测到的电子自旋共振（OD-ESR）的荧光对比度降低。我们证明，这种减少的OD-ESR对比是由NV中心的电荷状态动力学产生的，并且强烈依赖于表面依赖性，这表明表面工程对于基于钻石的颜色中心的纳米级传感应用至关重要。
Nitrogen-vacancy (NV) centers in diamond can be used for nanoscale sensing with atomic resolution and sensitivity; however, it has been observed that their properties degrade as they approach the diamond surface. Here we report that in addition to degraded spin coherence, NV centers within nanometers of the surface can also exhibit decreased fluorescence contrast for optically detected electron spin resonance (OD-ESR). We demonstrate that this decreased OD-ESR contrast arises from charge state dynamics of the NV center, and that it is strongly surface-dependent, indicating that surface engineering will be critical for nanoscale sensing applications based on color centers in diamond.
