Optical manipulation of nanoparticles (NPs) with nanoscale precision has been a goal of several research fields. One of the promising ways to realize this is the usage of localized surface plasmon (LSP). The electric field at hotspots near metallic structures is highly localized, which generates a sufficient force to trap NPs, and at the same time, the optical nonlinearity of NPs appears. In this Letter, we propose a scheme to super-resolutionally trap the NP into a particular hotspot of the metallic nanostructure array. The scheme is based on the optical nonlinearity of NPs, and utilizes two kinds of structured light: Gaussian and Laguerre-Gaussian beams. The results show the significant role of the optical nonlinearity in LSP trappings, and they are expected to open up new degrees of freedom to manipulate NPs.

中文翻译：

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超分辨率捕获：使用非线性光学响应的​​纳米粒子操纵。

具有纳米级精度的纳米颗粒（NPs）的光学操纵已成为多个研究领域的目标。实现此目标的一种有前途的方法是使用局部表面等离激元（LSP）。金属结构附近热点处的电场高度集中，从而产生足够的力来捕获NP，同时出现NP的光学非线性。在这封信中，我们提出了一种超分辨率地将NP捕获到金属纳米结构阵列的特定热点中的方案。该方案基于NP的光学非线性，并利用两种结构化光：高斯光束和拉盖尔-高斯光束。结果表明，光学非线性在LSP捕获中具有重要作用，并且有望为操纵NP开辟新的自由度。