Graphene superstrates for metamaterials

The electromagnetic properties of a photonic metamaterial are dramatically modified by a graphene monolayer superstrate. The strong polarizability of the graphene layer combined with the Fano-type, resonant plasmonic modes supported by the metamaterial leads to substantial red-shift of the narrow metamaterial resonances. These frequency shifts translate to multi-fold increase in the measured transmission at a specific wavelength. In our experiments we used chemical vapor deposited (CVD) graphene on structurally related metamaterial samples with plasmonic modes at different wavelength positions covering a spectral range from 1600 nm to 1800 nm