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 Fermi levels of graphene. Extinction spectra calculated by (a) the equivalent dielectric permittivity method and (b) the Mie theory with the Fermi level of graphene wrapping silica nanoparticle change from 1.0 eV to 0.3 eV, while keeping the radius of the graphene wrapping nanoparticle fixed at 60 nm. (c) The changes of resonance peak with Fermi levels of graphene calculated by the two theories. (d) Relative resonant peak difference between the two theories for different Fermi levels of graphene.
