Electric anapoles, arising from the destructive interference of primitive and toroidal electric dipole moments, have recently emerged as a fundamental class of non-scattering sources. On the other hand, super-scattering states represent the opposite regime wherein the scattering cross-section of a subwavelength particle exceeds the single-channel limit, leading to a strong scattering behavior. Here, we demonstrate that the interplay between the topology of light and the subwavelength scatterer can lead to these two opposite responses within an isolated all-dielectric meta-atom. In particular, we present the emergence of a new non-scattering state, referred to as hybrid anapole, which surpasses conventional electric dipole anapoles by achieving a remarkable 23-fold enhancement in the suppression of far-field radiation and almost threefold enhancement in the confinement of electromagnetic energy inside the meta-atom. We also explore the role of particle orientation and its inversion symmetry in the scattering response and predict the possibility of switching between non-scattering and super-scattering states within the same platform. The presented study elucidates the role of light and matter topologies in the scattering response of subwavelength meta-atoms, uncovering two opposite regimes of light-matter interaction and opening new avenues in applications such as nonlinear optics and spectroscopy.

中文翻译：

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通过 Mie-tronics 从非散射到超级散射

电阿纳极子是由原始电偶极矩和环形电偶极矩的相消干涉产生的，最近已成为一类基本的非散射源。另一方面，超散射态代表相反的状态，其中亚波长粒子的散射截面超过单通道极限，导致强烈的散射行为。在这里，我们证明了光的拓扑结构和亚波长散射体之间的相互作用可以导致孤立的全介电元原子内的这两种相反的响应。特别是，我们提出了一种新的非散射态，称为混合阿纳极，它超越了传统的电偶极子阿纳极，在远场辐射的抑制方面实现了 23 倍的显着增强，在限制方面实现了近三倍的增强元原子内部的电磁能。我们还探索了粒子取向及其反演对称性在散射响应中的作用，并预测了同一平台内非散射和超散射状态之间切换的可能性。本研究阐明了光和物质拓扑在亚波长元原子散射响应中的作用，揭示了光与物质相互作用的两种相反的机制，并为非线性光学和光谱学等应用开辟了新途径。