https://doi.org/10.1140/epjp/s13360-026-08018-4
Regular Article
Fano–EIT interference in a circular electromagnetic multi-port system
1
Laboratory of Sciences and Techniques for Engineering (LaSTI), National School of Applied Sciences Khouribga, Sultan Moulay Slimane University (USMS), Beni Mellal, Morocco
2
Laboratory of Materials, Waves, Energy and Environment, Team of Acoustic, Photonic and Materials, Faculty of Sciences, University Mohamed First Oujda, Oujda, Morocco
3
Laboratory of Computer Science and Interdisciplinary Physics, ENSF, Sidi Mohamed Ben Abdellah University, Fez, Morocco
4
Engineering Sciences Laboratory (LSI), Multidisciplinary, Faculty of Taza, Sidi Mohamed Ben Abdellah University, B.P. 1223, Gare, Taza, Morocco
a
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Received:
28
March
2026
Accepted:
27
June
2026
Published online:
6
July
2026
Abstract
In this paper, an electromagnetic study of a circular multi-port structure is introduced and carried out with Green’s function formulation. The method is based on the use of Fano resonances and electromagnetically induced transparency (EIT) due to bright-dark modes interferences. Through manipulating the modal coupling within the structure, a sharp operating frequency is transmitted into one output channel as desired and rejected from other output ports as well as input port. The Green’s function formalism provides a full description of the multi-channel scattering and the corresponding field distributions. The results characterize this combined Fano–EIT mechanism that achieves high-efficiency frequency-selective routing and isolation in multi-port electromagnetic systems, which implies that advanced filtering devices and signal manipulation functionalities can be readily implemented based on the proposed system.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
