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Graphene is a two-dimensional material with a capability of gas sensing, which is here shown to be drastically improved by inducing gentle disorder in the lattice. We report that by using a focused ion beam technique, controlled disorder can be introduced into the graphene structure through Ga(+) ion irradiation. This disorder leads to an increase in the(More)
In this paper, we investigate the plasmonic properties of a graphene-silica-silicon (G-SiO₂-Si) multilayer nano-ribbon waveguide in the mid-IR spectral range using the finite element method. Numerical results show that single-mode operation and modal cut-off properties of the G-SiO₂-Si are highly sensitive to the width and chemical potential. In particular,(More)
In this paper, we theoretically investigate the guiding properties of two vertically coupled cylindrical graphene-coated nanowires (GNWs) integrated with a thin high-index dielectric substrate. We show that the plasmonic properties of the proposed structure can be effectively modulated by changing the thickness of the dielectric substrate, the nanowire(More)
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