We investigate electromagnetic waves propagating along a metallic wire with a closer look at multiple propagating modes. To this goal, metallic loss is examined for its influence on a hybrid wave. The number of resonance modes is found to strongly depend on the rotational azimuthal mode indices. Based on the highest quality factor, selections are made among the multiple modes. We captured both divisions and mergers of the wave-number extents of the residual functions signifying the nonlinear dispersion relation. In addition, the migrations of the groups of local minima for multiple modes are illustrated from a viewpoint of quasi-temporal evolution. Furthermore, we illustrate collective behaviors of nanowire plasmonics in terms of two constituent waves and their interactions.
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This study has been supported by the National Research Foundation (NRF) of Republic of Korea (Grant Numbers: NRF-2011-0023612 and NRF-2015R1D1A1A01056698).
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Lee, H., Mok, J., Kuzmin, D.A. et al. Multiple propagating modes of nanowire plasmonics. Opt Quant Electron 48, 499 (2016). https://doi.org/10.1007/s11082-016-0772-y
- Electromagnetic waves
- Azimuthal mode index
- Metallic loss