Abstract

The problem of diffraction of the electromagnetic plane wave field on a layered nanoparticle with a metal plasmon layer on the surface of a transparent substrate is considered. Based on the discrete sources method, the influence of spatial nonlocality in a metal on the intensity of the near field and absorption cross section is studied. The cases of particle excitation both by a propagating wave and by a evanescent wave are considered. It is shown that the substrate provides a more significant influence on optical characteristics of the near field than on the intensity in the far zone. It is established that taking into account the nonlocality effect in the metal leads to a significant decrease in the plasmon resonance amplitude with a small shift to the shortwave region.

中文翻译：

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非局部性对基片上层状粒子近场特性的影响分析

摘要

考虑了在透明基板的表面上具有金属等离子体激元层的层状纳米粒子上的电磁平面波场的衍射问题。基于离散源方法，研究了金属中空间非局部性对近场强度和吸收截面的影响。考虑了通过传播波和van逝波激发粒子的情况。结果表明，与远区强度相比，基片对近场光学特性的影响更大。已经确定，考虑到金属中的非局部效应会导致等离子体激元共振幅度的显着降低，并且向短波区域的偏移很小。