On-chip nonlinear plasmonics with graphene-metal nanostructures

This work demonstrates coherent nonlinear interaction between surface plasmon polaritons (SPPs), supported by gold nanoresonators, and monolayer graphene. It is shown that the coupling to SPPs not only enhances the amplitude of the Raman scattering in graphene, but also affects the spectral characteristics of the Stokes emission by broadening and blue shifting the emission lineshape.