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5 October 2023 Abnormal dispersion of surface plasmon polaritons in the ultra-strong coupling regime
Mikhail A. Noginov, Md Golam R. Chowdhury, Leila Hesami, Shamaar R. Howard, Kanij Khabir
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Proceedings Volume PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; PC126480O (2023) https://doi.org/10.1117/12.2677813
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
We have studied dispersion of surface plasmon polaritons (SPPs) in the Kretcshmann’s geometry (prism/Ag/dye-doped polymer) in weak, intermediate, and ultra-strong exciton-plasmon coupling regimes. The dispersion curves obtained in the reflection experiment, were in a good agreement with the simple model predictions at small concentrations of dye (Rh590 and Rh610) in the polymer (PMMA). At the same time, a highly unusual multi-segment ladder-like dispersion curves were observed at extra-large dye concentrations. The dispersion curves observed in polymers co-doped with two dyes (Rh590 and Rh610) suggest strong coupling of excitons in the Kretchmann’s geometry. Acknowledgments: NSF 1856515, DOE/NNSA DE-NA0004007.
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Mikhail A. Noginov, Md Golam R. Chowdhury, Leila Hesami, Shamaar R. Howard, and Kanij Khabir "Abnormal dispersion of surface plasmon polaritons in the ultra-strong coupling regime", Proc. SPIE PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, PC126480O (5 October 2023); https://doi.org/10.1117/12.2677813
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KEYWORDS
Surface plasmon polaritons
Dyes
Polymers
Excitons
Polymethylmethacrylate
Reflection
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