Numerical study of magneto-optical binding between two dipolar particles under illumination by two counter-propagating waves

IF 4.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
R. M. Abraham-Ekeroth
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引用次数: 1

Abstract

Introduction: The formation of a stable magneto plasmonic dimer with THz resonances is theoretically studied for the principal directions of the system. Unlike a recent report, our work provides a complete description of the full photonic coupling for arbitrary magnetic fields as, for instance, unbalanced particle spins. Methods: As an illustration, we consider two small, n-doped InSb nanoparticles under illumination by two counter-propagating plane waves. Results: Remarkably, when an external magnetic field exists, the symmetry in the system is broken, and a resonant radiation pressure for the dimer appears. Similarly, tunable inter-particle forces and spins are exerted on the non-reciprocal dimer. The system is also characterized when the magnetic field is absent. Moreover, we show how the mechanical observables truly characterize the dimer since their resonance dependency contains detailed information about the system. Discussion: Unlike far-field observables like absorption, mechanical magnitudes depend on the system's near-field. In addition, the nature of the particle spins is originally explained by the energy flow's behavior around the dimer. This work constitutes a generalization of any previous approach to optical binding between small nanoparticles. It paves the way for fully controlling optical matter and nano factory designs based on surface plasmon polaritons.
两个反向传播波照射下两个偶极粒子间磁光结合的数值研究
引言:从理论上研究了系统主方向上具有太赫兹共振的稳定磁等离子体二聚体的形成。与最近的一份报告不同,我们的工作提供了对任意磁场(例如,不平衡粒子自旋)的全光子耦合的完整描述。方法:例如,我们考虑两个小的n掺杂InSb纳米颗粒在两个反向传播的平面波的照射下。结果:值得注意的是,当外部磁场存在时,系统中的对称性被破坏,二聚体出现共振辐射压力。类似地,可调的粒子间力和自旋施加在不可逆的二聚体上。当没有磁场时,该系统也具有特征。此外,我们展示了机械可观察器如何真正表征二聚体,因为它们的共振依赖性包含了关于系统的详细信息。讨论:与吸收等远场可观察性不同,机械大小取决于系统的近场。此外,粒子自旋的性质最初是由二聚体周围的能量流行为来解释的。这项工作是对以往任何小纳米颗粒之间光学结合方法的概括。它为完全控制光学物质和基于表面等离子体激元的纳米工厂设计铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Frontiers in Nanotechnology
Frontiers in Nanotechnology Engineering-Electrical and Electronic Engineering
CiteScore
7.10
自引率
0.00%
发文量
96
审稿时长
13 weeks
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