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Study of modal properties in graphene-coated nanowires integrated with substrates

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Abstract

In this paper, we show that graphene-coated nanowire integrated with a semi-elliptical dielectric substrate could enable excellent subwavelength transmission performance in the mid-infrared range. The fundamental graphene plasmon mode behaviors on the thickness of silica layer, ratio of long- to short-axis of the ellipse, nanowire radius, and chemical potential of graphene are revealed in detail. By improving the geometric parameters and the surface conductivity of graphene, results show that deep-subwavelength modal field size and long propagation could be achieved. Our findings may promote the applications of graphene-coated nanowires in tunable nanoscale photonic devices and sensors.

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Acknowledgements

This research was supported by the China Postdoctoral Science Foundation (2020M671247), Key Scientific Research Project of Henan College (21A140029), Open Research Fund of Zhengzhou Normal University, Scientific Research Starting Foundation of Zhengzhou Normal University.

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Authors and Affiliations

  1. School of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou, 450044, Henan, China

    Da Teng, Jinkang Guo, Yandie Yang & Wenshuai Ma

  2. Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China

    Kai Wang

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  1. Da Teng
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  2. Jinkang Guo
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Teng, D., Guo, J., Yang, Y. et al. Study of modal properties in graphene-coated nanowires integrated with substrates. Appl. Phys. B 126, 173 (2020). https://doi.org/10.1007/s00340-020-07525-1

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