Barbiero Martina, Castelletto Stefania, Gan Xiaosong, Gu Min
Laboratory of Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne, Victoria 3001, Australia.
School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.
Light Sci Appl. 2017 Nov 3;6(11):e17085. doi: 10.1038/lsa.2017.85. eCollection 2017 Nov.
Due to their exceptional optical and magnetic properties, negatively charged nitrogen-vacancy (NV) centers in nanodiamonds (NDs) have been identified as an indispensable tool for imaging, sensing and quantum bit manipulation. The investigation of the emission behaviors of single NV centers at the nanoscale is of paramount importance and underpins their use in applications ranging from quantum computation to super-resolution imaging. Here, we report on a spin-manipulated nanoscopy method for nanoscale resolutions of the collectively blinking NV centers confined within the diffraction-limited region. Using wide-field localization microscopy combined with nanoscale spin manipulation and the assistance of a microwave source tuned to the optically detected magnetic resonance (ODMR) frequency, we discovered that two collectively blinking NV centers can be resolved. Furthermore, when the collective emitters possess the same ground state spin transition frequency, the proposed method allows the resolving of each single NV center via an external magnetic field used to split the resonant dips. In spin manipulation, the three-level blinking dynamics provide the means to resolve two NV centers separated by distances of 23 nm. The method presented here offers a new platform for studying and imaging spin-related quantum interactions at the nanoscale with super-resolution techniques.
由于其优异的光学和磁性特性,纳米金刚石(NDs)中的带负电荷的氮空位(NV)中心已被视为成像、传感和量子比特操纵不可或缺的工具。在纳米尺度上对单个NV中心的发射行为进行研究至关重要,这支撑着它们在从量子计算到超分辨率成像等一系列应用中的使用。在此,我们报告一种自旋操纵纳米显微镜方法,用于对限制在衍射极限区域内的集体闪烁NV中心进行纳米级分辨率成像。利用宽场定位显微镜结合纳米级自旋操纵,并借助调谐到光探测磁共振(ODMR)频率的微波源,我们发现可以分辨出两个集体闪烁的NV中心。此外,当集体发射体具有相同的基态自旋跃迁频率时,所提出的方法允许通过用于分裂共振凹陷的外部磁场分辨出每个单个NV中心。在自旋操纵中,三能级闪烁动力学提供了分辨相距23纳米的两个NV中心的方法。本文提出的方法为利用超分辨率技术在纳米尺度上研究和成像与自旋相关的量子相互作用提供了一个新平台。