Metal nanostructures support plasmon oscillations on their surfaces, which normally decay very quickly. Nevertheless, the lifetime of these oscillations can be extended near a longer lifetime particle, e.g., a molecule. We utilize this phenomenon for ultrahigh (single-molecule) resolution ultrafast apertureless (scattering) applications. We demonstrate the phenomenon with the numerical solutions of 3D Maxwell equations. We use a nm-sized quantum emitter (QE) for the long lifetime particle. We place the QE at the apex of a metal-coated atomic force microscope tip. We illuminate the tip with a femtosecond laser. The near-field on the metal apex decays quickly. After some time, one receives the scattering signal only from the vicinity of the QE. Thus, the resolution becomes single-QE size. We propose the use of a stress-induced defect center in a 2D material as the QE. The tip indentation of the 2D material, transferred to the tip, originates a defect center located right at the sharpest point of the tip, which is exactly at its apex. Our method can equally be facilitated for single-molecule-size chemical manipulation.

中文翻译：

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通过等离子体寿命延长的单分子分辨率超快近场光学显微镜

金属纳米结构在其表面支持等离子体振荡，通常衰减非常快。然而，这些振荡的寿命可以在寿命更长的粒子（例如分子）附近延长。我们将这种现象用于超高（单分子）分辨率超快无孔径（散射）应用。我们用 3D 麦克斯韦方程组的数值解来证明这一现象。我们对长寿命粒子使用纳米尺寸的量子发射器 (QE)。我们将 QE 放置在金属涂层原子力显微镜尖端的顶端。我们用飞秒激光照亮尖端。金属顶点上的近场衰减很快。一段时间后，一个接收的散射信号仅从QE附近。因此，分辨率变为单 QE 大小。我们建议在二维材料中使用应力引起的缺陷中心作为 QE。2D 材料的尖端压痕转移到尖端，在尖端最锐利的点处产生一个缺陷中心，正好在其顶点。我们的方法同样可以促进单分子大小的化学操作。