Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles
Shi Zhe1, †, 
, Yang Yang1, 2, †, , Gan Lin1, Li Zhi-Yuan‡,
, Yang Yang1, 2, †, , Gan Lin1, Li Zhi-Yuan‡, Extinction spectra of graphene wrapping core–shell nanoparticle with different radii. Extinction spectra calculated by (a) the equivalent dielectric permittivity method and (b) the Mie theory with the radius of graphene wrapping silica nanoparticle changing from 10 to 100 nm, while keeping the graphene Fermi level fixed at 0.6 eV. (c) The change of resonance peak with different radii of nanoparticle calculated by the two theories. (d) The relative resonant peak difference between the two theories at different radii of nanoparticle.
