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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 35,
  • Issue 20,
  • pp. 4553-4558
  • (2017)

Graphene Surface Plasmons With Dielectric Metasurfaces

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Abstract

An approach to capture light efficiently into graphene surface plasmons by patterning the sinusoidal dielectric metasurfaces above and below the graphene sheet is proposed. The presence of plasmonic resonance is demonstrated by means of an analytical model based on the transformation optics through the extraction of effective graphene conductivity, which is further revealed via a numerical study of the optical spectra as a function of grating parameters at the subwavelength scale. Besides, the resonant position is found to be sensitive to the dielectric contacted with graphene. These findings can deepen our understanding of plasmon resonances and pave the way to the design of graphene plasmonic devices like refractive index sensors.

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