Observation and control of blinking nitrogen-vacancy centres in discrete nanodiamonds
Observation and control of blinking nitrogen-vacancy centres in discrete nanodiamonds
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DOI：
10.1038/nnano.2010.56
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发表时间：
2010-05-01
影响因子：
38.3
通讯作者：
Rabeau, J. R.
中科院分区：
文献类型：
--
作者：
Bradac, C.;Gaebel, T.;Rabeau, J. R.
钻石中的氮 - 空位色心在环境条件下可发生强烈的、对自旋敏感的光学跃迁，这使得它们在量子光学（1）、纳米级磁测量（2，3）和生物标记（4）等应用中颇具吸引力。尽管在团聚的爆轰纳米金刚石（5）和研磨后的纳米金刚石（6）中已观察到氮 - 空位中心，但在非常小的孤立纳米金刚石（7）中尚未观察到。在此，我们报道了在室温下首次直接观察到离散的5纳米纳米金刚石中的氮 - 空位中心，包括纳米金刚石发光的间歇性（闪烁）的证据。我们还表明，通过修饰纳米金刚石的表面来控制这种闪烁是可能的。
Nitrogen-vacancy colour centres in diamond can undergo strong, spin-sensitive optical transitions under ambient conditions, which makes them attractive for applications in quantum optics(1), nanoscale magnetometry(2,3) and biolabelling(4). Although nitrogen-vacancy centres have been observed in aggregated detonation nanodiamonds(5) and milled nanodiamonds(6), they have not been observed in very small isolated nanodiamonds(7). Here, we report the first direct observation of nitrogen-vacancy centres in discrete 5-nm nanodiamonds at room temperature, including evidence for intermittency in the luminescence (blinking) from the nanodiamonds. We also show that it is possible to control this blinking by modifying the surface of the nanodiamonds.