论文标题
具有环境扫描量子传感器显微镜的纳米级电场成像
Nanoscale Electric Field Imaging with an Ambient Scanning Quantum Sensor Microscope
论文作者
论文摘要
Diamond中的氮呈（NV）中心是一种有前途的量子传感器，具有广泛使用的传感能力。虽然扫描NV磁力测定法已建立，但NV电磁法迄今已限于散装钻石。在这里，我们演示了在环境条件下的钻石扫描尖端的顶点的外部交流（AC）和直接（DC）电场。由于表面上的电荷噪声，在低频下观察到了强烈的电场筛选效果。我们定量测量其频率依赖性，并通过机械振荡DC场的尖端来克服此筛选。我们的扫描NV电磁体达到了26 mV um^（-1）Hz^（-1/2）的AC电场灵敏度，DC E-Field梯度敏感性为2 V um^（-2）Hz^（ - 1/2），以及以NV-Sample距离限制了sub-100 nm分辨率。我们的工作代表了建立基于扫描探针的多模式量子传感平台的重要一步。
Nitrogen-vacancy (NV) center in diamond is a promising quantum sensor with remarkably versatile sensing capabilities. While scanning NV magnetometry is well-established, NV electrometry has been so far limited to bulk diamonds. Here we demonstrate imaging external alternating (AC) and direct (DC) electric fields with a single NV at the apex of a diamond scanning tip under ambient conditions. A strong electric field screening effect is observed at low frequencies due to charge noise on the surface. We quantitatively measure its frequency dependence, and overcome this screening by mechanically oscillating the tip for imaging DC fields. Our scanning NV electrometry achieved an AC E-field sensitivity of 26 mV um^(-1) Hz^(-1/2), a DC E-field gradient sensitivity of 2 V um^(-2) Hz^(-1/2), and sub-100 nm resolution limited by the NV-sample distance. Our work represents an important step toward building a scanning-probe-based multimodal quantum sensing platform.
