Optimizing Reflectivity in Bi-isotropic Multilayer Mirrors: The Role of Chiral and Tellegen Parameter Ratios
| Authors | Z. Mezache1, M. Berka2, 3 |
| Affiliations |
1Institue of Optics and Fine Mechanics, University of Ferhat Abbas Setif 1, 19000 Setif, Algeria 2Department of Electrotechnic, University Mustapha Stambouli of Mascara, 29000 Mascara, Algeria 3E.P.O Laboratory, 22000 Sidi Bel Abbés, University of S.B.A, Algeria |
| Е-mail | zinemezaache@yahoo.fr |
| Issue | Volume 18, Year 2026, Number 2 |
| Dates | Received 10 February 2026; revised manuscript received 19 April 2026; published online 29 April 2026 |
| Citation | Z. Mezache1, M. Berka, J. Nano- Electron. Phys. 18 No 2, 02035 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(2).02035 |
| PACS Number(s) | 07.05.Tp, 78.67.Pt |
| Keywords | Bi-isotropic multilayer mirrors, Chirality parameter optimization, Non-reciprocity effects, Photonic crystal structures, Tellegen media. |
| Annotation |
This work introduces an innovative approach to optimizing the reflectivity of bi-isotropic multilayer mirrors at normal incidence through systematic manipulation of critical design parameters. The study demonstrates that high optical index contrast in material selection, combined with an increased number of bi-layers, significantly enhances reflection by creating multiple interfaces for electromagnetic interaction. By strategically adjusting layer thicknesses, favoring thinner high-index layers and thicker low-index layers, reflectivity can be substantially improved. A pivotal finding reveals that the ratio of bi-isotropic parameters (chirality to non-reciprocity) plays a crucial role in performance optimization, with lower ratios (below unity) achieving reflectivity values exceeding 92 % at λ = 500 nm, while higher ratios (above unity) progressively reduce reflectivity to approximately 68 %. A mathematical model relating reflectivity to parameter ratios is derived, providing a predictive tool for design optimization. This research leverages the unique electromagnetic properties of chiral and Tellegen bi-isotropic materials, exploring previously untapped characteristics to revolutionize modern optical devices. The originality lies in proposing novel strategies for applications in advanced optics and photonic crystals, unlocking new possibilities for optical communication, sensing technologies, and precision electromagnetic control systems. This comprehensive investigation offers fresh insights into how structural and parametric adjustments impact bi-isotropic mirrors, advancing their practical implementation in next-generation photonic technologies. |
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List of References |
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