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金针尖辅助下的金刚石中浅层单NV色心三维定位

Three-dimensional localization of the individual shallow NV center in diamond using a gold tip

  • 摘要: 本工作提出了一种利用金针尖的近场猝灭效应,对金刚石中单个浅层 NV色心进行三维定位的方法。我们的实验装置结合了原子力显微镜(AFM),用于精确控制金针尖与 NV 色心之间的距离,同时搭配自制的共焦显微镜实时监测 NV 色心的荧光信号。该方法可实现超分辨率的横向定位,获得了 38.0 nm 的半高全宽(FWHM)和0.7 nm 的定位不确定度。此外,我们演示了该方法判定 NV 色心深度的潜力,并结合时域有限差分(FDTD)模拟进行了深度测量。与其他深度测定方法相比,这种手段能够同时实现单个 NV 中心的横向与纵向定位,有望促进对 NV 色心周围局部环境的精密操控。

     

    Abstract: This work presents a method for the three-dimensional localization of individual shallow NV center in diamond, leveraging the near-field quenching effect of a gold tip. Our experimental setup involves the use of an atomic force microscope to precisely move the gold tip close to the NV center, while simultaneously employing a home-made confocal microscope to monitor the fluorescence of the NV center. This approach allows for lateral super-resolution, achieving a full width at half maximum (FWHM) of 38.0 nm and a location uncertainty of 0.7 nm. Additionally, we show the potential of this method for determining the depth of the NV centers. We also attempt to determine the depth of the NV centers in combination with finite-difference time-domain (FDTD) simulations. Compared to other depth determination methods, this approach allows for simultaneous lateral and longitudinal localization of individual NV centers, and holds promise for facilitating manipulation of the local environment surrounding the NV center.

     

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