Nanodiamonds carrying silicon-vacancy quantum emitters with almost lifetime-limited linewidths
Nanodiamonds carrying silicon-vacancy quantum emitters with almost lifetime-limited linewidths
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DOI：
10.1088/1367-2630/18/7/073036
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发表时间：
2016-07-20
影响因子：
3.3
通讯作者：
Jelezko, Fedor
中科院分区：
文献类型：
--
作者：
Jantzen, Uwe;Kurz, Andrea B.;Jelezko, Fedor
纳米金刚石中的色心是量子传感、生物成像和量子光学应用的重要资源。在这里，我们报告了纳米金刚石中小于200 nm的单个色心的前所未有的窄光学跃迁。这一演示是使用带负电荷的硅空位中心实现的，硅空位中心最近由于其在大块金刚石中的优异光学性能而受到相当大的关注。我们已经测量了大量纳米金刚石中硅空位中心的集合，其具有1.05 nmat 5 K的不均匀分布。个别光谱线窄于360 MHz的光致发光激发，并校正表观光谱扩散产生了约200 MHz的均匀线宽，这是接近寿命极限。这些结果表明在这些纳米金刚石样品中实现的高结晶质量，并且推进了纳米金刚石托管的颜色中心用于量子光学应用的适用性。
Colour centres in nanodiamonds are an important resource for applications in quantum sensing, biological imaging, and quantum optics. Here we report unprecedented narrow optical transitions for individual colour centres in nanodiamonds smaller than 200 nm. This demonstration has been achieved using the negatively charged silicon vacancy centre, which has recently received considerable attention due to its superb optical properties in bulk diamond. We have measured an ensemble of silicon-vacancy centres across numerous nanodiamonds to have an inhomogeneous distribution of 1.05 nmat 5 K. Individual spectral lines as narrower than 360 MHz were measured in photoluminescence excitation, and correcting for apparent spectral diffusion yielded an homogeneous linewidth of about 200 MHz which is close to the lifetime limit. These results indicate the high crystalline quality achieved in these nanodiamond samples, and advance the applicability of nanodiamond-hosted colour centres for quantum optics applications.