The tunability of surface plasmon polaritons in graphene waveguide structures

S. Khoubafarin Doust, V. Siahpoush, Asghar Asgari Tokaldani

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)


    The tunability of propagation properties of surface plasmon polariton (SPP) modes in a waveguide formed by two parallel graphene layers separated by a dielectric layer is studied. For this purpose, the dispersion equation of the structure is numerically solved and the effects of applied bias voltage, the role of effective structural parameters, and electron–phonon scattering rate on the propagation of symmetric and antisymmetric SPP waves are investigated. The results of calculations show that considering the electron–phonon scattering rate as a function of Fermi energy and temperature leads to a considerable decrease in the propagation length of SPPs. As the main result of this work, tuning the propagation characteristics of SPPs is possible by varying any of the parameters such as applied voltage, thickness of insulating layer between two graphene layers and permittivities of dielectric layers, and finally the temperature. It is found that antisymmetric mode benefits from a larger propagation length in comparison with that of the symmetric mode.

    Original languageEnglish
    Pages (from-to)1633–1639
    Number of pages7
    Issue number5
    Early online date30 Nov 2016
    Publication statusPublished - Oct 2017


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