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Numerical Simulation of Nanoparticle Images in Scanning Near-Field Optical Microscopy

机译：扫描近场光学显微镜中纳米颗粒图像的数值模拟

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摘要

The images of magnetic and nonmagnetic nanoparticles obtained by scanning near-field microscopy in the photon collection mode are numerically simulated. A theoretical approach that uses tensor electro-dynamic Green's functions to find the optical near field in a given observation scheme is considered. Typical images of nanoparticles with various shapes are obtained by numerical simulation. Subject to boundary conditions, the plane of polarization is shown to change at topographic features (edges and angles) of objects studied. This makes the observation of the magnetic structure of a nanoparticle with a magnetooptic method difficult. The near-field study of the magnetization distribution in homogeneous thin films appears to be more effective, since the rotation of plane of polarization is associated primarily with the magnetic properties of the sample in this case.
机译：数值模拟了通过扫描近场显微镜在光子收集模式下获得的磁性和非磁性纳米粒子的图像。考虑一种使用张量电动格林函数在给定观测方案中找到光学近场的理论方法。通过数值模拟获得具有各种形状的纳米颗粒的典型图像。受边界条件的影响，极化平面在所研究对象的地形特征（边缘和角度）处会发生变化。这使得难以用磁光法观察纳米颗粒的磁性结构。在这种情况下，由于极化平面的旋转主要与样品的磁性有关，因此对均匀薄膜中的磁化分布进行近场研究似乎更为有效。

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