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Non-Hermitian electronics multipods of electromagnetically induced transparency (EIT) and absorption (EIA)

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Abstract

We study a non-Hermitian electronic dimers system based on an imaginary resistor (Z) in a (N + 2) level atomic multipod configuration. Non-Hermitian systems depend on a gain/loss parameter and are specifically marked by a degeneracy exhibited at an exceptional point separating different phases of complex modes dynamics. Interestingly, the structural characterization and the dispersive properties reveal a broad range of strong coupling where the interplay between the control and the probe field induce a simultaneous EIT, EIA and ATS. Here, by identifying the underlying physical mechanisms, we show that multiple windows of transparency can be strongly enhanced by the incorporation of several dimers in the multipod network. On the other hand, if the pumping field is resonant in the weak regime, multiple EIT and EIA windows result in the number of dimers. Remarkably, the proposed system embedded a multiple coupling mechanism whose modulation induces a couplingless point (CPLP) whereby the energy cross. At this point EIT and related phenomena vanish.

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Acknowledgements

Authors would like here to acknowledge TABEU Stéphane Boris of HITASTEC (High-tech and Slow Technology) for helpful discussions.

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Authors and Affiliations

  1. Laboratory of Mechanics, Materials and Structures, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon

    Senghor Tagouegni

  2. Nonlinear Physics and Complex Systems Group, Department of Physics, The Higher Teacher’s Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon

    Senghor Tagouegni, Fernande Fotsa-Ngaffo & Aurélien Kenfack-Jiotsa

  3. Institute of Wood Technologies, University of Yaoundé I, P.O. Box 306, Mbalmayo, Cameroon

    Fernande Fotsa-Ngaffo

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  1. Senghor Tagouegni
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Correspondence to Senghor Tagouegni.

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Tagouegni, S., Fotsa-Ngaffo, F. & Kenfack-Jiotsa, A. Non-Hermitian electronics multipods of electromagnetically induced transparency (EIT) and absorption (EIA). Opt Quant Electron 54, 200 (2022). https://doi.org/10.1007/s11082-022-03629-4

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