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arXiv 1707.07006physics.opticscond-mat.mes-hall
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非磁性纳米结构附近磁偶极子的衰减率

Decay Rate of Magnetic Dipoles near Non-magnetic Nanostructures

Peter R. Wiecha, Arnaud Arbouet, Aurélien Cuche, Vincent Paillard, Christian Girard

摘要:

在这篇文章中,我们提出了一个简洁的理论框架的基础上混合场磁化率来描述非磁性纳米结构诱导的磁偶极子的衰减。这种方法首先说明在简单的情况下,其中可以得到的衰减率的解析表达式。然后,我们表明,这种形式主义涉及的体积离散化和广义传播子的计算更精细的数值实现可以预测任意几何形状的纳米结构附近的磁偶极子的动态。最后,我们证明了这种数值方法的多功能性耦合到进化优化算法。通过这种方式,我们预测的结构的几何形状,最大限度地促进相对于电发射器的磁跃迁的衰减。

英文摘要:

In this article, we propose a concise theoretical framework based on mixed field-susceptibilities to describe the decay of magnetic dipoles induced by non--magnetic nanostructures. This approach is first illustrated in simple cases in which analytical expressions of the decay rate can be obtained. We then show that a more refined numerical implementation of this formalism involving a volume discretization and the computation of a generalized propagator can predict the dynamics of magnetic dipoles in the vicinity of nanostructures of arbitrary geometries. We finally demonstrate the versatility of this numerical method by coupling it to an evolutionary optimization algorithm. In this way we predict a structure geometry which maximally promotes the decay of magnetic transitions with respect to electric emitters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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