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Mode and sensing properties of a silicon-based hybrid plasmonic microring resonator

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Abstract

A silicon-based hybrid plasmonic microring resonator consisting of a silicon-on-insulator ring which is separated from a silver nanoring by a low-permittivity dielectric is proposed for sensing applications. Benefitting from the hybrid modes and the circular-shaped cross section of nanoring, the hybrid microcavity can attract part of the cavity energy from the silicon ring microcavity, achieving high energy ratio and high refractive index sensitivity. The performance of the hybrid microcavity has been investigated by employing a finite element method and analyzed considering the different structure geometry, showing high quality factor of 1181, small mode volume of 0.154 µm3 and large refractive index sensitivity of 529.6 nm/RIU (refractive index unit). Thus, the presented silicon-based hybrid plasmonic microring resonator provides the potential applications in sensing at deep sub-wavelength scale.

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Acknowledgements

This work was supported by the Natural Science Foundation of Zhejiang Province of China under Grant Nos. LY15F050001, 2011C21038 and 2011C22051, the National Natural Science Foundation of China under Grant No. 61007029 and Zhejiang Province Key Science and Technology Innovation Team Project under Grant No. 2010R50007.

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Authors and Affiliations

  1. Institute of Information Optics, Zhejiang Normal University, Jinhua, 321004, China

    Meng Zhang, Genzhu Wu, Daru Chen & Binbin Liu

  2. Joint Research Laboratory of Optics of Zhejiang Normal University and Zhejiang University, Hangzhou, 310058, China

    Meng Zhang, Genzhu Wu, Daru Chen & Binbin Liu

  3. Xingzhi College, Zhejiang Normal University, Jinhua, 321004, China

    Genzhu Wu

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  1. Meng Zhang
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  2. Genzhu Wu
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Zhang, M., Wu, G., Chen, D. et al. Mode and sensing properties of a silicon-based hybrid plasmonic microring resonator. J Opt 48, 308–313 (2019). https://doi.org/10.1007/s12596-019-00552-y

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