Abstract

The study considers diffraction radiation, which is excited when an electron moves near a cluster of two interacting subwavelength particles. The interaction is manifested in the fact that the radiation field from each particle is determined not only by the external field of the electron, but also by the field of the neighboring particle. Based on the obtained expressions for the radiation field, the function of cluster polarizability is determined. It characterizes the cluster response to the field of the electron as a whole. It is interesting that the obtained response function of the cluster to an external field, even in the framework of linear theory, generally depends on the external field itself.

中文翻译：

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极化辐射中相互作用粒子簇的极化率

摘要

该研究考虑了衍射辐射，当电子在两个相互作用的亚波长粒子的簇附近移动时会激发该辐射。相互作用体现在以下事实上：来自每个粒子的辐射场不仅取决于电子的外场，而且还取决于相邻粒子的场。根据获得的辐射场表达式，确定团簇极化率的函数。它表征了簇对电子整体的响应。有趣的是，即使在线性理论的框架内，所获得的簇对外部场的响应函数通常也取决于外部场本身。