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Graphene-coated holey metal films: tunable molecular sensing by surface plasmon resonance (1304.3291v2)
Published 11 Apr 2013 in cond-mat.mes-hall and physics.optics
Abstract: 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 microns. 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.