Electromagnetic effects in anti-Hermitian media with gain and loss
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-01
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Language
en
Pages
11
1-11
1-11
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PHYSICAL REVIEW RESEARCH, Volume 6, issue 1
Abstract
Incorporating both gain and loss into electromagnetic systems provides possibilities to engineer effects in unprecedented ways. Concerning electromagnetic effects in isotropic media that have concurrently electric and magnetic responses, there is, in fact, a degree of freedom to distribute the gain and loss in different effective material parameters. In this paper, we analytically scrutinize wave interactions with those media, and, most importantly, we contemplate the extreme scenario where such media are anti-Hermitian. Considering various conditions for excitation, polarization, and geometry, we uncover important effects and functionalities such as lasing into both surface waves and propagating waves, conversion of evanescent source fields to transmitted propagating waves, full absorption, and enhancing backward to forward scattering ratio. We hope that these findings explicitly show the potential of anti-Hermiticity to be used in optical physics as well as microwave engineering for creating and using unconventional wave phenomena.Description
Funding Information: L.F. was partly supported by DoinQTech, Jane and Aatos Erkko Foundation. L.F. and M.S.M. thank X. Wang, M. Nyman, and B. Zerulla for their invaluable help with numerical simulations. Also, L.F. wishes to acknowledge the support of Carsten Rockstuhl. Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
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Freter, L, Mirmoosa, M S, Sihvola, A, Simovski, C R & Tretyakov, S A 2024, ' Electromagnetic effects in anti-Hermitian media with gain and loss ', PHYSICAL REVIEW RESEARCH, vol. 6, no. 1, 013070, pp. 1-11 . https://doi.org/10.1103/PhysRevResearch.6.013070
