Features of backward waves and negative refraction in absorbing bi-isotropic media and metamaterials

3区物理与天体物理 Q1 Engineering

Waves in Random and Complex Media Pub Date : 2023-10-27 DOI:10.1080/17455030.2023.2273308

Evgenii Starodubtsev

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引用次数: 0

Abstract

ABSTRACTConditions of the excitation of backward electromagnetic waves and negative refraction in absorbing bi-isotropic layered media and metamaterials are investigated. Based on the exact analytical model, the features determined by absorption and inhomogeneity of the waves and possible metamaterial properties of the medium are ascertained. It is shown that only simultaneous realization of backward, backward with respect to the boundary between two media, and negative refraction is possible for each of the proper waves in a bi-isotropic layer. The conditions are obtained when two (one transmitted and one reflected waves) or all the four proper waves in the layer are backward and characterized by negative refraction on boundaries. Taking into account the calculation of Pointing’s vector and energy dissipation of the waves, it is shown that the well-known limitations on the chirality and nonreciprocity parameters require a clarification for the considered media.KEYWORDS: Bi-isotropic metamaterialsbackward wavesnegative refraction Disclosure statementNo potential conflict of interest was reported by the author(s).

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双各向同性介质和超材料吸收中的后向波和负折射特征

摘要研究了双各向同性层状介质和超材料中反向电磁波的激发和负折射的条件。基于精确解析模型，确定了由波的吸收和非均匀性决定的特征以及介质可能的超材料性质。结果表明，双各向同性层中每一个固有波只能同时实现反向折射、相对于两介质边界的反向折射和负折射。得到了层内两个(一个透射波和一个反射波)或全部四个固有波反向并在边界上呈负折射的条件。考虑到波的指向矢量和能量耗散的计算，表明对于所考虑的介质，众所周知的手性和非互易参数的限制需要澄清。关键词:双各向同性超材料后向波负折射披露声明作者未报告潜在的利益冲突。

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

Waves in Random and Complex Media 物理-物理：综合

自引率

0.00%

发文量

677

审稿时长

3.0 months

期刊介绍： Waves in Random and Complex Media (formerly Waves in Random Media ) is a broad, interdisciplinary journal that reports theoretical, applied and experimental research related to any wave phenomena. The field of wave phenomena is all-pervading, fast-moving and exciting; more and more, researchers are looking for a journal which addresses the understanding of wave-matter interactions in increasingly complex natural and engineered media. With its foundations in the scattering and propagation community, Waves in Random and Complex Media is becoming a key forum for research in both established fields such as imaging through turbulence, as well as emerging fields such as metamaterials. The Journal is of interest to scientists and engineers working in the field of wave propagation, scattering and imaging in random or complex media. Papers on theoretical developments, experimental results and analytical/numerical studies are considered for publication, as are deterministic problems when also linked to random or complex media. Papers are expected to report original work, and must be comprehensible and of general interest to the broad community working with wave phenomena.