论文标题
磁电场电动力学:搜索磁电点散射器
Magnetoelectric-field electrodynamics: Search for magnetoelectric point scatterers
论文作者
论文摘要
小颗粒对电磁波(EM)波的共振散射被认为是超材料科学中的基本问题之一。目前,特殊的亚波长谐振器被认为是手性和双异性超材料中的结构元素。人们普遍的共识是,这些小散点子的行为就像“人造原子”,元原子,具有强烈的电和磁反应以及这些响应之间的互连。但是,这些元原子中观察到的磁电(Me)耦合的作用与由固有磁电磁性引起的近场操作特性无关。这引起了一个问题,我是否真的存在EM辐射的点散射体。在本文中,我们表明存在带有电和磁性偶极子携带的激发的介观结构,它们的表现就像点散射器具有固有的磁电性。在这样的亚波长谐振器中,电化和磁化的相干振荡可以视为静电(ES)和磁静力(MS)标量波函数所描述的准危机振荡。 ME共振效果源于两个,ES和MS,振荡的耦合。这些谐振器的近场(称为ME近场)的特征是同时违反时间逆转和反转对称性。在研究与这些领域相关的领域和EM问题时,我们提出了我领域电动力学的概念。像轴局场电动力学和轴轴 - 孔子问题一样,我们谈论的是具有指定源术语的修改后的麦克斯韦方程,以及针对大型颗粒的量子场理论。轴轴字段是玻色子标量场时,ME字段是费米电场。这些磁场的特征是具有旋转超流量和量化涡流的能量本征态。
Resonant scattering of electromagnetic (EM) waves by small particles is considered as one of the basic problem in metamaterial science. At present, special subwavelength resonators are considered as structural elements in chiral and bianisotropic metamaterials. There is a general consensus that these small scatterers behave like "artificial atoms", meta-atoms, with strong electrical and magnetic responses and an interconnection between these responses. However, the observed effect of magnetoelectric (ME) coupling in these meta-atoms is not associated with the near-field manipulation properties caused by intrinsic magnetoelectricity. This arises the question whether ME point scatterers of EM radiation really exist. In this paper, we show that there are mesoscopic structures with electric and magnetic dipole-carrying excitations that behave like point scatterers with their inherent magnetoelectricity. In such subwavelength resonators, coherent oscillations of the electric polarization and magnetization can be considered as quasistatic oscillations described by electrostatic (ES) and magnetostatic (MS) scalar wave functions. The ME resonance effect arises from the coupling of two, ES and MS, oscillations. The near fields of these resonators, called the ME near fields, are characterized by simultaneous violation of time reversal and inversion symmetry. In study of ME fields and EM problems associated with these fields, we put forward the concept of ME-field electrodynamics. Like the axion-field electrodynamics and the axion-polariton problem, we are talking about modified Maxwell equations with a presudoscalar source terms and the quantum field theory for massive particles. While the axion fields are boson scalar fields, the ME fields are fermionic fields. These fields are characterized by energy eigenstates with rotational superflows and quantized vortices.