Transmission in bilayer graphene through time-periodic potential

The transport property of Dirac electrons through bilayer graphene under a time periodic field is investigated. The effect of external field strength and the system parameters on the transmission probabilities is investigated. The results show that the applied time-periodic potential provides sidebands for Dirac electrons to tunnel through the bilayer graphene, and transport property of system exhibits various kinds of behaviors with the change of external field strength and structure parameters. We also find that, for normal and close to normal incidence, the perfect reflection that was observed for the static barrier is found to persist for the oscillating barrier.