Effect of the Nanodiamond Host on a Nitrogen-Vacancy Color-Centre Emission State
Effect of the Nanodiamond Host on a Nitrogen-Vacancy Color-Centre Emission State
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DOI：
10.1002/smll.201200574
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发表时间：
2013-01-14
期刊：
影响因子：
13.3
通讯作者：
Rabeau, James R.
中科院分区：
文献类型：
--
作者：
Bradac, Carlo;Gaebel, Torsten;Rabeau, James R.
通过对晶体主体的精心设计：其尺寸、表面官能团和界面基底，证明了对纳米金刚石（ND）中单个发光氮空位（NV）中心的量子态的控制。通过ND主体的渐进蚀刻，NV中心被诱导从潜伏的、通过连续的、到间歇的或闪烁的发射状态切换。本文阐明了ND中NV中心的闪烁机制，并提出了一个定性模型，从中心电子隧穿到受体位置的角度解释了这一现象。这些测量结果表明，基板材料及其接近NV负责的荧光不稳定性。
Control over the quantum states of individual luminescent nitrogen-vacancy (NV) centres in nanodiamonds (NDs) is demonstrated by careful design of the crystal host: its size, surface functional groups, and interfacing substrate. By progressive etching of the ND host, the NV centres are induced to switch from latent, through continuous, to intermittent or blinking emission states. The blinking mechanism of the NV centre in NDs is elucidated and a qualitative model proposed to explain this phenomenon in terms of the centre electron(s) tunnelling to acceptor site(s). These measurements suggest that the substrate material and its proximity to the NV are responsible for the fluorescence intermittency.