论文标题
通过钻石中的集合氮气接种中心实现高动力范围的宽带磁场传感
Realization of high-dynamic-range broadband magnetic-field sensing with ensemble nitrogen-vacancy centers in diamond
论文作者
论文摘要
我们提出了一种新的磁力测定法，该方法集成了一个单晶钻石中的氮呈（NV）集合，并具有扩展的动态范围，用于监测快速变化的磁场。使用闭环频率锁定技术跟踪NV中心旋转的谐振频率，并快速跳跃以实现10 kHz的测量带宽，从而允许检测到高达0.723 t/s.的快速变化磁信号，最高为0.723 t/s.，该技术最高的扩展动态范围表现出与Microwave源源的工作带的扩展动态范围。这个扩展的动态范围可达到4.3吨，比内在动态范围宽86倍。 NV旋转控制和信号处理（例如信号产生，微波频率控制，数据处理和读数）的基本组件集成在板级系统中。使用此平台，我们演示了宽带磁力测定法，优化灵敏度为4.2 nt-Hz-1/2。这种磁力测定法具有在多通道频率锁定矢量磁力计中实现的潜力，适用于多种实用应用，例如磁心电图和高精度电流传感器。
We present a new magnetometry method integrating an ensemble of nitrogen-vacancy (NV) centers in a single-crystal diamond with an extended dynamic range for monitoring the fast changing magnetic-field. The NV-center spin resonance frequency is tracked using a closed-loop frequency locked technique with fast frequency hopping to achieve a 10 kHz measurement bandwidth, thus, allowing for the detection of fast changing magnetic signals up to 0.723 T/s.This technique exhibits an extended dynamic range subjected to the working bandwidth of the microwave source. This extended dynamic range can reach up to 4.3 mT, which is 86 times broader than the intrinsic dynamic range. The essential components for NV spin control and signal processing such as signal generation, microwave frequency control, data processing and readout are integrated in a board-level system. With this platform, we demonstrate broadband magnetometry with an optimized sensitivity of 4.2 nT-Hz-1/2. This magnetometry method has the potential to be implemented in a multichannel frequency locked vector magnetometer suitable for a wide range of practical applications such as magnetocardiography and high-precision current sensors.
