▎ 摘　　要

At the terahertz frequency range, 2D material graphene is the most promising candidate for using as a functional part of magnetooptical devices because of discovered giant Faraday rotation and ability to dynamical properties control. In this paper magnetooptical properties of graphene were investigated. Numerical analysis on graphene-dielectric structure have shown the tunability of Faraday rotation and ellipticity in terms of amplitude and frequency by optical pumping of different radiation power and wavelength. Our work demonstrates alternative way for developing ultrafast optically tunable polarization modulators of THz wave.