Efficient signal processing for time-resolved fluorescence detection of nitrogen-vacancy spins in diamond
Efficient signal processing for time-resolved fluorescence detection of nitrogen-vacancy spins in diamond
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DOI：
10.1364/josab.33.000b28
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发表时间：
2016-03-01
影响因子：
1.9
通讯作者：
Childress, L.
中科院分区：
文献类型：
--
作者：
Gupta, A.;Hacquebard, L.;Childress, L.
氮空位中心电子自旋的室温荧光探测通常具有低信噪比，需要长时间的实验才能揭示平均信号。在这里，我们提出了一种分析时间分辨荧光数据的简单方法，仅通过信号处理就可以提高测量精度。将我们的技术应用于实验数据，发现信噪比有所改善，这相当于光子收集效率提高了14%。我们进一步研究了信噪比对激励功率的依赖关系，并使用速率方程模型对结果进行了分析。我们的结果为优化荧光自旋检测提供了准则，这对提高氮空位传感器的精度具有直接的意义。(C)2016年度美国光学学会
Room-temperature fluorescence detection of the nitrogen-vacancy center electronic spin typically has low signal to noise, requiring long experiments to reveal an averaged signal. Here, we present a simple approach to analysis of time-resolved fluorescence data that permits an improvement in measurement precision through signal processing alone. Applying our technique to experimental data reveals an improvement in signal to noise, which is equivalent to a 14% increase in photon collection efficiency. We further explore the dependence of the signal-to-noise ratio on excitation power and analyze our results using a rate equation model. Our results provide a rubric for optimizing fluorescence spin detection, which has direct implications for improving precision of nitrogen-vacancy-based sensors. (C) 2016 Optical Society of America