https://doi.org/10.1140/epjp/s13360-024-05677-z
Regular Article
Dual-band unidirectional reflectionlessness based on electromagnetically induced transparency-like in three-cavity array
Department of Physics, Yanbian University, 133002, Yanji, China
b
yqzhang@ybu.edu.cn
c
xrjin@ybu.edu.cn
Received:
17
June
2024
Accepted:
22
September
2024
Published online:
11
October
2024
We propose a scheme to realize the dual-band unidirectional reflectionlessness at an exceptional point in a non-Hermitian system based on electromagnetically induced transparency-like effect. This system is constructed with three plasmonic cavities side-coupled to a plasmonic waveguide. Furthermore, our study verifies that the proposed system can consistently realize dual-band unidirectional reflectionlessness in a wide range of phase shifts, coupling strengths, and loss rates. At the same time, the analysis results show that the position of the reflectionless peaks is robust to loss rates, and can be adjusted by tuning the coupling strength between the plasmonic cavities and the plasmonic waveguide, as well as the coupling strength within the double-cavity array.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
