Chen Bing, Hou Xianfei, Ge Feifei, Zhang Xiaohan, Ji Yunlan, Li Hongju, Qian Peng, Wang Ya, Xu Nanyang, Du Jiangfeng
School of Electronic Science and Applied Physics,Hefei University of Technology, Hefei, Anhui 230009, China.
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
Nano Lett. 2020 Nov 11;20(11):8267-8272. doi: 10.1021/acs.nanolett.0c03377. Epub 2020 Nov 2.
We report a new method to determine the orientation of individual nitrogen-vacancy (NV) centers in a bulk diamond and use them to realize a calibration-free vector magnetometer with nanoscale resolution. Optical vortex beam is used for optical excitation and scanning the NV center in a [111]-oriented diamond. The scanning fluorescence patterns of NV center with different orientations are completely different. Thus, the orientation information on each NV center in the lattice can be known directly without any calibration process. Further, we use three differently oriented NV centers to form a magnetometer and reconstruct the complete vector information on the magnetic field based on the optically detected magnetic resonance(ODMR) technique. Compared with previous schemes to realize vector magnetometry using an NV center, our method is much more efficient and is easily applied in other NV-based quantum sensing applications.
我们报告了一种确定块状金刚石中单个氮空位（NV）中心取向的新方法，并利用这些中心实现了具有纳米级分辨率的免校准矢量磁力计。光学涡旋光束用于光学激发并扫描[111]取向金刚石中的NV中心。不同取向的NV中心的扫描荧光图案完全不同。因此，无需任何校准过程即可直接得知晶格中每个NV中心的取向信息。此外，我们使用三个不同取向的NV中心组成一个磁力计，并基于光探测磁共振（ODMR）技术重建磁场的完整矢量信息。与先前使用NV中心实现矢量磁测量的方案相比，我们的方法效率更高，并且易于应用于其他基于NV的量子传感应用中。
