Graphene, a two-dimensional material made of carbon atoms arranged in a honeycomb lattice, has attracted enormous attention since its experimental realization in 2004  due to its unique mechanical, thermal, electrical and optical properties. Particularly in the THz spectrum, graphene predominantly exhibits a Drude-like response due to its easily generated and controlled free carriers and therefore is considered a suitable platform for dynamically tunable metasurface components . Such an example, are the so called thin film absorbers that are structures capable of absorbing all power of incident electromagnetic waves. They are used as non-reflective covering layers for shielding against electromagnetic radiation and minimization of backscattering from electromagnetic large structures. Within the concept of metasurfaces, thin film absorbers, are usually implemented by placing a lossy material on the top of a perfectly conducting metallic plate . Recently, an electrostatic gate-tunable perfect absorber based on a monolayer graphene over a grounded dielectric was demonstrated experimentally in the low THz regime . Nevertheless, the dynamic control of the absorption properties of such devices in an ultrafast way still remains a challenge.