A flexible control on electromagnetic behaviors of graphene oligomer by tuning chemical potential

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Abstract
In this work, we demonstrate that the electromagnetic properties of graphene oligomer can be drastically modified by locally modifications of the chemical potentials. The chemical potential variations of different positions in graphene oligomer have different impacts on both extinction spectra and electromagnetic fields. The flexible tailoring of the localizations of the electromagnetic fields can be achieved by precisely adjusting the chemical potentials of the graphene nanodisks at corresponding positions. The proposed nanostructures in this work lead to the practical applications of graphene-based plasmonic devices such as nanosensing, light trapping and photodetection.
Funding Information
  • Natural Science Fund of China (11774103)
  • Project for Cultivating Postgraduates’ Innovative Ability in Scientific Research of Huaqiao University (1611301026)

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