一种基于金刚石量子传感器的小型便携式显微磁成像装置

Alex Shaji, Kevin J. Rietwyk, Islay O. Robertson, Philipp Reineck, David A. Broadway, Jean-Philippe Tetienne
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引用次数: 0

摘要

基于金刚石氮空位量子传感器集成的磁成像已经成为一种有用的磁性材料空间表征和电流分布的技术。然而,到目前为止,演示仅限于实验室实验,使用相对笨重的仪器,需要人工处理钻石传感元件,阻碍了该技术的广泛采用。这里介绍了一种简单,紧凑的设备,可以在实验室环境外部署,并实现强大,简化的操作。它依赖于一个特殊设计的传感器头,直接集成了金刚石传感器,同时结合了微波天线和所有必要的光学元件。这个集成的传感器头辅以一个小型控制单元和一台显示产生的磁图像的笔记本电脑。该设备通过对磁性样品成像进行测试,证明在超过1mm的视场上空间分辨率为4 μ m,最佳灵敏度为45 μ T / (5 μ m)2像素。便携式磁成像仪器可用于将待测样品带到专业实验室不切实际或不需要的情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A Compact, Portable Device for Microscopic Magnetic Imaging Based on Diamond Quantum Sensors

A Compact, Portable Device for Microscopic Magnetic Imaging Based on Diamond Quantum Sensors

Magnetic imaging based on ensembles of diamond nitrogen-vacancy quantum sensors has emerged as a useful technique for the spatial characterization of magnetic materials and current distributions. However, demonstrations have so far been restricted to laboratory-based experiments using relatively bulky apparatus and requiring manual handling of the diamond sensing element, hampering broader adoption of the technique. Here a simple, compact device that can be deployed outside a laboratory environment and enables robust, simplified operation is presented. It relies on a specially designed sensor head that directly integrates the diamond sensor while incorporating a microwave antenna and all necessary optical components. This integrated sensor head is complemented by a small control unit and a laptop computer that displays the resulting magnetic image. The device is tested by imaging a magnetic sample, demonstrating a spatial resolution of 4 µm over a field of view exceeding 1 mm, and a best sensitivity of 45 µT per (5 µm)2 pixel. The portable magnetic imaging instrument may find use in situations where taking the sample to be measured to a specialist lab is impractical or undesirable.

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