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Discoveries and Explorations of Mode Splitting Phenomenon in Lossy Dielectric Waveguide

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Abstract

We discovered that a specific transmission mode in the fiber waveguide will split into two modes at near cut-off conditions when the fiber is coated with lossy dielectric nanofilms with higher refractive index. One of the two splitting modes is high lossy while the other is slightly lossy. We defined the “mode splitting coefficient” to describe the degree of mode splitting. We found that the biggest mode splitting coefficient was obtained at the mode cut-off wavelength using finite element method. Finally, we put forward an explanation towards the mode splitting phenomenon and expounded the relationship between the mode splitting and mode coupling.

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Funding

This work was supported by the Fundamental Research Funds for the Central Universities under Grant N180402023, the National Natural Science Foundation of China under Grant 51607028.

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Authors and Affiliations

  1. College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China

    Wan-Ming Zhao, Qi Wang, Jian-Ying Jing & Xue-Zhou Wang

  2. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, 110819, China

    Qi Wang

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  1. Wan-Ming Zhao
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  2. Qi Wang
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  3. Jian-Ying Jing
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  4. Xue-Zhou Wang
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Correspondence to Qi Wang.

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Zhao, WM., Wang, Q., Jing, JY. et al. Discoveries and Explorations of Mode Splitting Phenomenon in Lossy Dielectric Waveguide. Plasmonics 15, 481–487 (2020). https://doi.org/10.1007/s11468-019-01063-z

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  • DOI: https://doi.org/10.1007/s11468-019-01063-z

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