  In the presence of an external magnetic field, the optical response of
two-dimensional materials, whose charge carriers behave as massless Dirac
fermions with arbitrary anisotropic Fermi velocity, is investigated. Using Kubo
formalism, we obtain the magneto-optical conductivity tensor for these
materials, which allows to address the magneto-optical response of anisotropic
Dirac fermions from the well known magneto-optical conductivity of isotropic
Dirac fermions. As an application, we analyse the combined effects of
strain-induced anisotropy and magnetic field on the transmittance, as well as
on the Faraday rotation, of linearly polarized light after passing strained
graphene. The reported analytical expressions can be a useful tool to predict
the absorption and the Faraday angle of strained graphene under magnetic field.
Finally, our study is extended to anisotropic two-dimensional materials with
Dirac fermions of arbitrary pseudospin.
