Lifetime and dynamics of polaron and bipolaron in graphene nanoribbon under laser

In this paper, we have investigated the lifetime, mobility and effective mass of polaron and bipolaron in graphene under laser field by using the well-known Lee–Low–Pines transformations. In this study, it is seen that the laser affects mostly the dynamics parameters of polaron and bipolaron in graphene. We found that the laser reduces the lifetime of the polaron in the fundamental state and increases it in its excited state. The excited polaron survives to the effects of laser more than the excited bipolaron. However, the polaron and bipolaron in the fundamental state have about the same laser sensitivity. The polaron and bipolaron in graphene become less heavy; under laser, they get massless. Polaron and bipolaron present a good mobility as charge carriers in the presence of laser effect.