Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles

Shi Zhe^{1, †,}, Yang Yang^{1, 2, †,}, Gan Lin¹, Li Zhi-Yuan^‡,

Schematic of a 0D core–shell structure with graphene wrapping on silica nanoparticle. (a) The light blue ball presents the silica core with a radius of r_SiO₂, and its surface is covered with a monolayer of graphene in thickness of t_G. A plane wave propagating along the z-axis with the electric field polarized along the x axis is used to excite SPR in graphene wrapping silica nanoparticle. (b) The cross-section schematic of the core–shell structure of the graphene wrapping nanoparticle.