MAGNETO-OPTICAL ABSORPTION AND CYCLOTRON-IMPURITY RESONANCE IN MONOLAYER GRAPHENE

Abstract

We theoretically investigate the magneto-optical absorption in monolayer gra-phene, subjected to a perpendicular static magnetic field and an electromagnetic wave. The absorption coefficient (AC) is calculated taking account of the influence of the electron – im-purity interaction. The dependence of the AP on the photon energy is numerically evaluated and graphed. The absorption maxima satisfying the cyclotron resonant conditions are ob-served for both one- and two-photon absorption processes. The resonant peaks for the two-photon absorption are always much lower than that for the one-photon absorption. Howev-er, the contribution of the two-photon absorption is considerable and can not be neglected in nonlinear optical phenomena. Moreover, the dependence of the position of resonant peaks on the static magnetic field and temperature is analyzed and compared with those in previ-ous works as well as in conventional low-dimensional semiconductors.