Graphene-coated holey metal films: Tunable molecular sensing by surface plasmon resonance

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    We report on the enhancement of surface plasmon resonances in a holey bidimensional grating of subwavelength size, drilled in a gold thin film coated by a graphene sheet. The enhancement originates from the coupling between charge carriers in graphene and gold surface plasmons. The main plasmon resonance peak is located around 1.5 μm. A lower constraint on the gold-induced doping concentration of graphene is specified and the interest of this architecture for molecular sensing is also highlighted.
    Original languageEnglish
    Article number211108
    Number of pages4
    JournalApplied Physics Letters
    Issue number21
    Publication statusPublished - 2013

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