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π-Network Transmission Line Model for Plasmonic Waveguides with Cavity Structures

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Abstract

We propose a π-network transmission line model to investigate plasmonic metal-dielectric-metal (MDM) waveguides side-coupled with cavity structures. This model can effectively describe the transmission characteristics as a function of coupling distance in our proposed structures. And the π-network transmission line model is promoted to describe transmission spectra and scattering parameters in infinite element structures and periodic structures, which are confirmed by the finite-difference time-domain (FDTD) simulation results. In addition, the slow-light effects in waveguide side-coupled with periodic cavity structures are researched in our paper. And we first compare the slow-light effects in the plasmonic waveguide side-coupled with cavity structures and stub structures. These observations could be helpful to fundamental research and applications for integrated plasmonic devices.

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Acknowledgments

This work was funded by the Fundamental Research Funds for the Central Universities of Central South University under Grant No. 72150050429 and the National Natural Science Foundation of China under Grant No. 61275174.

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Authors and Affiliations

  1. College of Physics and Electronics, Central South University, Changsha, 410083, People’s Republic of China

    Zhihui He, Hongjian Li, Shiping Zhan, Boxun Li, Zhiquan Chen & Hui Xu

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  1. Zhihui He
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  2. Hongjian Li
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  3. Shiping Zhan
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  4. Boxun Li
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  5. Zhiquan Chen
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  6. Hui Xu
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Correspondence to Hongjian Li.

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He, Z., Li, H., Zhan, S. et al. π-Network Transmission Line Model for Plasmonic Waveguides with Cavity Structures. Plasmonics 10, 1581–1585 (2015). https://doi.org/10.1007/s11468-015-9981-7

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  • DOI: https://doi.org/10.1007/s11468-015-9981-7

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