“…Electrodynamic properties of graphene, which have been studied both experimentally 31,32,33,34 and theoretically 5,15,16,24,28,29,35,36,37,38,39,40,41,42,43,44,45,46,47,48 , also demonstrate non-trivial features in the frequency dependent conductivity 15,24,28,35,48 , photon-assisted transport 36 , microwave and far-infrared response 29,37,38,39,40,41 , plasmons spectrum 42,43,44,45,46 , et cetera. New electromagnetic modes, specific only for the graphene system, have been also predicted 47,48 .…”