论文标题
带有紫地的固态微波磁力计
A Solid-State Microwave Magnetometer with Picotesla-Level Sensitivity
论文作者
论文摘要
在多个敏感性低至$ \ sim $ 1 pt/$ \ sqrt {\ text {hz}} $的敏感性中，已经证明了使用氮相（NV）中心集合对低频磁场进行量子感测。然而，迄今为止，使用NV钻石的GHz制度中的高频磁力测定法的演示是敏感的数量级较低的顺序，在NT/$ \ sqrt {\ text {hz}} $ level上方。在这里，我们适应了具有高性能，低频量子传感器的微波频率技术。使用定制生长的NV富含钻石与用于高频传感的噪声取消方案相结合，我们演示了基于Rabi-sequence的磁力计，能够检测到2.87 GHz附近的微波磁场，并具有3.4 pt/$ \ sqrt {\ sqrt {\ textrm {\ textrm {hz {hz} $。我们在300 MHz频率范围内展示了幅度和相位感应和项目可调节性。该结果增加了NV集合物作为微波电路成像仪和天线近场探针的生存能力。
Quantum sensing of low-frequency magnetic fields using nitrogen-vacancy (NV) center ensembles has been demonstrated in multiple experiments with sensitivities as low as $\sim$1 pT/$\sqrt{\text{Hz}}$. To date, however, demonstrations of high-frequency magnetometry in the GHz regime with NV diamond are orders of magnitude less sensitive, above the nT/$\sqrt{\text{Hz}}$ level. Here we adapt for microwave frequencies techniques that have enabled high-performance, low-frequency quantum sensors. Using a custom-grown NV-enriched diamond combined with a noise cancellation scheme designed for high-frequency sensing, we demonstrate a Rabi-sequence-based magnetometer able to detect microwave fields near 2.87 GHz with a record sensitivity of 3.4 pT/$\sqrt{\textrm{Hz}}$. We demonstrate both amplitude and phase sensing and project tunability over a 300 MHz frequency range. This result increases the viability of NV ensembles to serve as microwave circuitry imagers and near-field probes of antennas.
