Fig. 1
From: A flexible control on electromagnetic behaviors of graphene oligomer by tuning chemical potential
a The schematic diagram of the graphene oligomer with symmetry D12h consisting of 13 identical graphene disks. b The simulation model of graphene oligomer. The graphene oligomer is placed on the silica substrate with n2 = 1.5 and is surrounded by air with n1 = 1. c, d The real part and imaginary part of neff with the chemical potential of graphene ranging from 0.4 to 0.8 eV