标题： 微波磁电场 显示英文标题

标题： Microwave magnetoelectric fields

摘要： 我们证明，在无源的亚波长微波场区域中，可以存在时间变化的电场和磁场之间具有局部耦合的场结构，这种耦合不同于常规传播的自由空间电磁波中的电-磁耦合。 为了将这些场结构与常规的电磁（EM）场结构区分开来，我们将它们称为磁电（ME）场。 我们研究微波ME近场的结构和守恒定律。 我们表明，存在微波ME近场的源——ME粒子。 这些粒子由具有磁偶极振荡谱的小型准二维铁氧体圆盘表示。 来自这些粒子的近场具有拓扑上独特的功率流涡旋、非零的手性以及一个扭结自由度。 我们对微波ME近场的研究分为两篇连续的论文。 在本文中，我们给出关于具有磁偶极振荡谱的铁氧体粒子内部和外部电场和磁场特性的理论背景，这些特性导致微波ME近场的出现。 基于获得的ME近场结构，我们讨论了在人工电磁材料中观察到的所谓ME相互作用效应。 在下一篇文章中，我们展示了微波ME近场及其与物质相互作用的数值和实验研究。 显示英文摘要

摘要： We show that in a source-free subwavelength region of microwave fields there can exist the field structures with local coupling between the time-varying electric and magnetic fields differing from the electric-magnetic coupling in regular-propagating free-space electromagnetic waves. To distinguish such field structures from regular electromagnetic (EM) field structures, we term them as magnetoelectric (ME) fields. We study a structure and conservation laws of microwave ME near fields. We show that there exist sources of microwave ME near fields - the ME particles. These particles are represented by small quasi-2D ferrite disks with the magnetic-dipolar-oscillation spectra. The near fields originated from such particles are characterized by topologically distinctive power-flow vortices, non-zero helicity, and a torsion degree of freedom. Our studies of the microwave ME near fields are combined in two successive papers. In this paper we give a theoretical background of properties of the electric and magnetic fields inside and outside of a ferrite particle with magnetic-dipolar-oscillation spectra resulting in appearance of the microwave ME near fields. Based on the obtained structures of the ME near fields, we discuss effects of so-called ME interactions observed in artificial electromagnetic materials. In the next paper, we represent numerical and experimental studies of the microwave ME near fields and their interactions with matter.