Time dependent quantum dynamical study of laser induced current switching in graphene

We present a numerical study on the effect of laser light irradiation on the electronic transport through single layer graphene. We employed the wave packet quantum dynamics method to take into account the effect of laser light with circular polarization irradiated only through the finite channel region of graphene device. Our simulations have shown that the transmission through graphene can be switched off by irradiating the circularly polarized laser light, in a way consistent with the generation of dynamical band gap by the circularly polarized light predicted previously. It has also been suggested that the presence of irradiation induced remote valley away from the Dirac point importantly influences the current switching.