Graphene-coated nanowires with a drop-shaped cross section for both the strong mode confinement and the long-range propagation

Xuan Cong; Yingxue Huang; Min Zhang; Hong Su; Irene Ling Li; Huawei Liang

doi:10.1117/12.2319163

19 September 2018 Graphene-coated nanowires with a drop-shaped cross section for both the strong mode confinement and the long-range propagation

Xuan Cong, Yingxue Huang, Min Zhang, Hong Su, Irene Ling Li, Huawei Liang

Author Affiliations +

Proceedings Volume 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI; 107221Z (2018) https://doi.org/10.1117/12.2319163
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Both the strong mode confinement and the low propagation loss are longed for designing highly integrated terahertz (THz) devices, but they are difficult to be achieved at the same time. Here, a graphene-coated nanowire with a dropshaped cross section (GNDCS) is proposed with the long-range propagation and strong confinement. We found this waveguide can support two kinds of graphene surface plasmon polaritons (GSPPs), outside-dominant and insidedominant modes, with distinctly different energy distributions. Interestingly, both modes can achieve low-loss propagation with strong mode confinement. In particular, the outside-dominant mode can attain an extremely long propagation length (1mm) and the inside-dominant mode has a very high energy utilization rate. These excellent characteristics make the waveguide very useful in the nanophotonics, bio-photonics and highly integrated THz circuits.

Citation Download Citation

Xuan Cong, Yingxue Huang, Min Zhang, Hong Su, Irene Ling Li, and Huawei Liang "Graphene-coated nanowires with a drop-shaped cross section for both the strong mode confinement and the long-range propagation", Proc. SPIE 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI, 107221Z (19 September 2018); https://doi.org/10.1117/12.2319163

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KEYWORDS

Wave propagation

Nanowires

Terahertz radiation

Graphene

Radio propagation

Refractive index

Waveguides

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