论文标题
快速扫描氮散布磁力测定法
Fast scanning nitrogen-vacancy magnetometry by spectrum demodulation
论文作者
论文摘要
我们展示了一种频谱解调技术，可大大加快扫描氮 - 胶合中心磁力测定法的数据采集速率。我们的方法依赖于通过快速，宽频率扫描与光亮发光信号的相锁检测结合的快速，宽频率扫描对电子自旋共振的定期激发。该方法可以通过频率反馈扩展，以实现对旋转共振的实时跟踪。快速扫描磁力测定法对于信号动态范围较大的样品特别有用，例如米利特拉（Millitesla），例如对于铁磁体或铁磁体。我们通过在模型AntiferRomagnet上方绘制杂散字段来演示我们的方法，以高达100 \，Hz的像素速率，Hz和超过一个兆像素的图像分辨率的像素速率，以像素速率为单位。
We demonstrate a spectrum demodulation technique for greatly speeding up the data acquisition rate in scanning nitrogen-vacancy center magnetometry. Our method relies on a periodic excitation of the electron spin resonance by fast, wide-band frequency sweeps combined with a phase-locked detection of the photo-luminescence signal. The method can be extended by a frequency feedback to realize real-time tracking of the spin resonance. Fast scanning magnetometry is especially useful for samples where the signal dynamic range is large, of order millitesla, like for ferro- or ferrimagnets. We demonstrate our method by mapping stray fields above the model antiferromagnet $α$-Fe$_2$O$_3$ (hematite) at pixel rates of up to 100\,Hz and an image resolution exceeding one megapixel.
