Magnetic field-induced enhancement of the nitrogen-vacancy fluorescence quantum yield
Magnetic field-induced enhancement of the nitrogen-vacancy fluorescence quantum yield
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DOI：
10.1039/c7nr02093g
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发表时间：
2017-07-21
期刊：
影响因子：
6.7
通讯作者：
Gibson, B. C.
中科院分区：
文献类型：
--
作者：
Capelli, M.;Reineck, P.;Gibson, B. C.
金刚石中的氮空位（NV）中心是一种独特的光学缺陷，目前在许多应用中使用，并且非常需要增强其荧光亮度的方法。我们观察到实验的NV量子产率的增强高达7%，在散装金刚石所造成的外部磁场相对于无场的情况下。这一观察是合理的现象在磁场的NV激发态三重态到单重态跃迁率的依赖。在低激发强度下，理论模型与实验结果定性一致。我们的研究结果显着有助于我们的基本理解的NV缺陷的金刚石的物理性质。
The nitrogen-vacancy (NV) centre in diamond is a unique optical defect that is used in many applications today and methods to enhance its fluorescence brightness are highly sought after. We observed experimentally an enhancement of the NV quantum yield by up to 7% in bulk diamond caused by an external magnetic field relative to the field-free case. This observation is rationalised phenomenologically in terms of a magnetic field dependence of the NV excited state triplet-to-singlet transition rate. The theoretical model is in good qualitative agreement with the experimental results at low excitation intensities. Our results significantly contribute to our fundamental understanding of the photophysical properties of the NV defect in diamond.