Giant Faraday rotation in cross-shaped graphene array in THz region

We study numerically the Faraday effect in cross-shaped graphene array. Our geometrical structure in the optimized configuration can provide the Faraday rotation of about 3° for the frequency 8.9 THz with a relatively low magnetic field of 1T and 13 ° for a magnetic fields of 10 T. These rotation value is about seven times higher than the results published until now. The frequency position of maximum Faraday rotation can be controlled by changing the Fermi energy of graphene or the dimensions of the array.