论文标题
纳米木木中心中氮的荧光轮廓
Fluorescence profile of a nitrogen-vacancy center in a nanodiamond
论文作者
论文摘要
广泛探索了含有发光点缺陷的纳米符号，以探索用于量子生物传感的应用，例如纳米级磁力测定法，温度法和电子法。这种应用开发的主要挑战是，即使从相同的批次或名义上相同的制造过程中获得，颗粒之间观察到的荧光性能的差异很大。 By theoretically modelling the emission of nitrogen-vacancy colour centres in spherical nanoparticles, we are able to show that the fluorescence spectrum varies with the exact position of the emitter within the nanoparticle, with noticeable effects seen when the diamond radius, $a$, is larger than around 100 nm, and significantly modified fluorescence profiles found for larger particles when $a=200$ nm and $a=300$ nm，而微不足道的效果$ a = 100 $ nm。这些结果表明，对于控制发射特性，必须在狭义的一批钻石晶体内的点缺陷位置的可再现几何形状。我们的结果对于理解可以在多大程度上优化用于生物感应应用的程度很有用。
Nanodiamonds containing luminescent point defects are widely explored for applications in quantum bio-sensing such as nanoscale magnetometry, thermometry, and electrometry. A key challenge in the development of such applications is a large variation in fluorescence properties observed between particles, even when obtained from the same batch or nominally identical fabrication processes. By theoretically modelling the emission of nitrogen-vacancy colour centres in spherical nanoparticles, we are able to show that the fluorescence spectrum varies with the exact position of the emitter within the nanoparticle, with noticeable effects seen when the diamond radius, $a$, is larger than around 100 nm, and significantly modified fluorescence profiles found for larger particles when $a=200$ nm and $a=300$ nm, while negligible effects below $a=100$ nm. These results show that the reproducible geometry of point defect position within narrowly sized batch of diamond crystals is necessary for controlling the emission properties. Our results are useful for understanding the extent to which nanodiamonds can be optimised for bio-sensing applications.
