Tunable terahertz broadband absorber based on a composite structure of graphene multilayer and silicon strip array

Zhaocheng Zhai, Le Zhang*, Xiangjun Li, Sanshui Xiao

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    We propose a terahertz broadband absorber composed by silicon strips with continuous graphene on top of a metal mirror. The simulation results show that under the combined effect of the Fabry–Perot resonance and the dipole mode oscillation excited in the silicon strip array interacting with graphene, this structure can achieve an ultra-wide absorption band from 0.73 to 1.95 THz with absorbance of 90%. By changing the size of the silicon strips or the Fermi level of graphene, the working band of the absorber can be tuned.

    Original languageEnglish
    JournalOptics Communications
    Volume431
    Pages (from-to)199-202
    Number of pages4
    ISSN0030-4018
    DOIs
    Publication statusPublished - 15 Jan 2019

    Keywords

    • Broadband absorber
    • Multilayer graphene
    • Terahertz wave
    • Tunable absorber

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