Charge state dynamics and optically detected electron spin resonance contrast of shallow nitrogen-vacancy centers in diamond
Charge state dynamics and optically detected electron spin resonance contrast of shallow nitrogen-vacancy centers in diamond
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DOI：
10.1103/physrevresearch.2.033263
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
Zhiyang Yuan;Mattias Fitzpatrick;L. Rodgers;S. Sangtawesin;S. Srinivasan;N. D. de Leon
中科院分区：
文献类型：
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作者：
Zhiyang Yuan;Mattias Fitzpatrick;L. Rodgers;S. Sangtawesin;S. Srinivasan;N. D. de Leon
金刚石中的氮空位（NV）中心可用于具有原子分辨率和灵敏度的纳米级传感；然而，据观察，当它们接近金刚石表面时，它们的性能会降低。在这里，我们报告说，除了自旋相干性降低之外，表面纳米范围内的 NV 中心还可以表现出光学检测电子自旋共振 (OD-ESR) 的荧光对比度降低。我们证明，这种降低的 OD-ESR 对比度是由 NV 中心的电荷态动力学引起的，并且它强烈依赖于表面，这表明表面工程对于基于钻石色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.