▎ 摘　　要

Graphene was shown to have strongly nonlinear electrodynamic properties. In particular, being irradiated by an electromagnetic wave with the frequency omega, it can efficiently generate higher frequency harmonics. Here, we predict that in a specially designed structure "graphene-dielectric-metal" the third-harmonic (3 omega) intensity can be increased by more than two orders of magnitude as compared to an isolated graphene layer. (C) 2015 AIP Publishing LLC.