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  • Title: Excitation of plasmonic waves in graphene by guided-mode resonances.
    Author: Gao W, Shu J, Qiu C, Xu Q.
    Journal: ACS Nano; 2012 Sep 25; 6(9):7806-13. PubMed ID: 22862147.
    Abstract:
    We propose an active plasmonic device based on graphene. Highly confined plasmonic waves in monolayer graphene are efficiently excited using an etched diffractive grating on silicon. The guided-wave resonance of the combined structure creates a sharp notch on the normal-incidence transmission spectra, as the incident optical wave couples to the graphene plasmonic wave. This structure can be used as a highly tunable optical filter or a broad-band modulator because the resonant wavelength can be quickly tuned over a wide wavelength range by a small change in the Fermi energy level of the graphene. In this paper, we analyze the performance of this device with finite-difference time-domain simulations. We compare the proposed structure with recently demonstrated graphene nanoribbons based on bound plasmonic oscillations.
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