论文标题
钻石磁力测定法和朝向子齿轮DC现场测量
Diamond magnetometry and gradiometry towards subpicotesla DC field measurement
论文作者
论文摘要
钻石中的氮空位（NV）中心已发展为一个强大的固态平台，用于紧凑的量子传感器。但是，高灵敏度测量值通常对激光的泵浦强度和施加脉冲控制的其他约束。在这里，我们展示了具有低强度光激发的高灵敏度NV集合集合测量值。比较了连续波的磁性磁共振和连续激发的Ramsey测量与锁定检测的连续磁共振结合的方法，以进行优化。还研究了梯度测定法，以迈向未知梯度的未屏蔽测量。磁力计通过进一步施加2 mm的传感尺寸的通量指南，在73 s的测量中显示了0.3-0.7 pt的最小检测场，对应于2.6-6 pt/hz^0.5的磁场灵敏度。结合我们以前在钻石AC磁力测定法上的努力，钻石磁力计承诺在环境条件下使用Picotesla灵敏度和立方毫米的感应体积执行宽带磁力测定法。
Nitrogen vacancy (NV) centers in diamond have developed into a powerful solid-state platform for compact quantum sensors. However, high sensitivity measurements usually come with additional constraints on the pumping intensity of the laser and the pulse control applied. Here, we demonstrate high sensitivity NV ensemble based magnetic field measurements with low-intensity optical excitation. DC magnetometry methods like, e.g., continuous-wave optically detected magnetic resonance and continuously excited Ramsey measurements combined with lock-in detection, are compared to get an optimization. Gradiometry is also investigated as a step towards unshielded measurements of unknown gradients. The magnetometer demonstrates a minimum detectable field of 0.3-0.7 pT in a 73 s measurement by further applying a flux guide with a sensing dimension of 2 mm, corresponding to a magnetic field sensitivity of 2.6-6 pT/Hz^0.5. Combined with our previous efforts on the diamond AC magnetometry, the diamond magnetometer is promising to perform wide bandwidth magnetometry with picotesla sensitivity and a cubic-millimeter sensing volume under ambient conditions.
