Tip-enhanced sub-diffraction fluorescence imaging of nitrogen-vacancy centers in nanodiamonds
Tip-enhanced sub-diffraction fluorescence imaging of nitrogen-vacancy centers in nanodiamonds
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DOI：
10.1063/1.4773364
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发表时间：
2013-01-07
影响因子：
4
通讯作者：
Chang, Huan-Cheng
中科院分区：
文献类型：
--
作者：
Hui, Yuen Yung;Lu, Yu-Chun;Chang, Huan-Cheng
这项工作表明，原子力显微镜的金尖端不仅增强了纳米金刚石中氮空位中心的荧光，而且还将无孔径近场扫描光学显微镜中颗粒荧光图像的光学分辨率提高至 40 nm。当尖端与 20-30 nm 钻石紧密接触时，平均荧光强度增强为 3。通过测量荧光衰变寿命和饱和强度，我们确认荧光增强主要是由辐射衰变率的增加引起的。 (C) 2013 年美国物理研究所。 [http://dx.doi.org/10.1063/1.4773364]
This work demonstrates that the gold tip of an atomic force microscope enhances not only the fluorescence of the nitrogen-vacancy centers in nanodiamonds but also improves the optical resolution of the fluorescence image of the particles down to 40 nm in an apertureless near-field scanning optical microscope. With the tip in close contact with 20-30 nm diamonds, the average fluorescence intensity enhancement is 3. By measuring the fluorescence decay lifetime and the saturation intensity, we confirm that the fluorescence enhancement is contributed predominantly by the increase of the radiative decay rate. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773364]