纳米制造的固体浸没透镜配准到金刚石中的单个发射器
Nano-fabricated solid immersion lenses registered to single emitters in diamond
摘要：
我们描述了一种技术，用于制造微米和纳米结构，将荧光缺陷在金刚石的位置精度在数百纳米。使用共聚焦荧光显微镜和聚焦离子束（FIB）蚀刻，我们首先定位一个合适的缺陷相对于金刚石表面上的注册标记，然后使用这些坐标蚀刻的结构。我们在这里展示的技术，通过蚀刻一个8微米直径的半球定位，使一个单一的带负电荷的氮空位缺陷位于其起源。这种类型的结构通过消除金刚石-空气界面处的折射和像差损失来增加光子收集效率。我们对制造前后的荧光光子计数率进行了直接比较，并观察到由于半球的存在而增加了8倍。
英文摘要：
We describe a technique for fabricating micro- and nano-structures incorporating fluorescent defects in diamond with a positional accuracy in the hundreds of nanometers. Using confocal fluorescence microscopy and focused ion beam (FIB) etching we first locate a suitable defect with respect to registration marks on the diamond surface and then etch a structure using these coordinates. We demonstrate the technique here by etching an 8 micron diameter hemisphere positioned such that a single negatively charged nitrogen-vacancy defect lies at its origin. This type of structure increases the photon collection efficiency by removing refraction and aberration losses at the diamond-air interface. We make a direct comparison of the fluorescence photon count rate before and after fabrication and observe an 8-fold increase due to the presence of the hemisphere.
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