arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.10205physics.opticsphysics.app-ph
收藏

极短波长纵向电磁波

Longitudinal electromagnetic waves with extremely short wavelength

Denis Sakhno, Eugene Koreshin, Pavel A. Belov

摘要:

真空和大多数物质中的电磁波具有横向极化。具有平行于波矢的电场的纵向电磁波是非常罕见的,并且在特定条件下出现在有限类介质中,例如在等离子体中。在这项工作中,我们研究了一种易于制造的超材料的色散特性,该超材料由两个三维立方体晶格连接的金属线插入到另一个中,也称为交织线介质。结果表明,超材料支持纵波在非常宽的频带从非常低的频率到布拉格共振的结构。波的特征是前所未有的短波长,与材料的周期相当。揭示的效果突出的空间色散响应的交错线介质,并提供了一个路径产生强空间变化的电磁场。

英文摘要:

Electromagnetic waves in vacuum and most materials have transverse polarization. Longitudinal electromagnetic waves with electric field parallel to wave vector are very rare and appear under special conditions in a limited class of media, for example in plasma. In this work, we study the dispersion properties of an easy-to-manufacture metamaterial consisting of two three-dimensional cubic lattices of connected metallic wires inserted one into another, also known as an interlaced wire medium. It is shown that the metamaterial supports longitudinal waves at extremely wide frequency band from very low frequencies up to the Bragg resonances of the structure. The waves feature unprecedentedly short wavelengths comparable to the period of the material. The revealed effects highlight spatially dispersive response of interlaced wire medium and provide a route toward generating electromagnetic fields with strong spatial variation.

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。

↑