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arXiv 2409.02199quant-ph
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纳米金刚石中氮-空位中心在近零磁场下的无微波成像磁力测量

Microwave-free imaging magnetometry with nitrogen-vacancy centers in nanodiamonds at near-zero field

Saravanan Sengottuvel, Omkar Dhungel, Mariusz Mrózek, Arne Wickenbrock, Dmitry Budker, Wojciech Gawlik, Adam M. Wojciechowski

AI总结:

本研究利用纳米金刚石中NV色心的零场交叉弛豫特性,实现了无微波宽场成像磁力计,在近零场下达到4.5 μT/√Hz灵敏度,为生物和导电样品提供无干扰磁场成像方案。

摘要:

利用金刚石中氮-空位(NV)色心的磁力测量主要依赖于微波光谱学。然而,微波可能会妨碍涉及生物系统或薄导电样品的某些研究。本工作展示了一种利用纳米金刚石中NV中心的宽场、无微波成像磁力计,通过利用环境条件下(不施加微波)近零磁场附近的交叉弛豫特性来实现。为此,我们在扫描背景磁场的同时,测量了滴铸在载流导电图案上的140 nm纳米金刚石中零场交叉弛豫的中心位移、对比度和线宽,实现了4.5 $\mathrm{μT/\sqrt{Hz}}$的灵敏度。我们的工作使得纳米金刚石中的NV零场特性能够应用于零场和低场区域的磁场传感,并突显了基于纳米金刚石的无微波全光学宽场磁力测量的潜力。

英文摘要:

Magnetometry using Nitrogen-Vacancy (NV) color centers in diamond predominantly relies on microwave spectroscopy. However, microwaves may hinder certain studies involving biological systems or thin conductive samples. This work demonstrates a wide-field, microwave-free imaging magnetometer utilizing NV centers in nanodiamonds by exploiting the cross-relaxation feature near zero magnetic fields under ambient conditions without applying microwaves. For this purpose, we measure the center shift, contrast, and linewidth of the zero-field cross-relaxation in 140 nm nanodiamonds drop-cast on a current-carrying conductive pattern while scanning a background magnetic field, achieving a sensitivity of 4.5 $\mathrm{μT/\sqrt{Hz}}$. Our work allows for applying the NV zero-field feature in nanodiamonds for magnetic field sensing in the zero and low-field regimes and highlights the potential for microwave-free all-optical wide-field magnetometry based on nanodiamonds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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