Measuring the optical transmittance of graphene with silicon substrates within a particular range of the spectrum from the terahertz to infrared regime

We have carried out an experimental and theoretical study of the optical transmittance in terahertz to infrared regime of graphene multilayer on Si substrate under moderate electric field. It is shown that graphene multilayer on Si substrate has low resistance at room temperature, less than that of the silicon alone. The theoretical and experimental results also show good convergence at short and long wavelengths and that can be important to application of graphene in optoelectronics devices.