Determination of the number of graphene layers on one-dimensional photonic crystal by using polarization-dependent absorption effect

In this paper, we study polarization-dependent optical absorption of a graphene on the top of one-dimensional photonic crystal (1DPC), which offer a method to accurately count the number of graphene layers. The 1DPC is composed of 10 pairs of (SiO2/TiO2), and the two kinds of material is transparent, which is different from the commonly substrate with significant contrast to graphene. The absorption difference fitting formula is given by the 0-10 graphene layer. It may be applicable to other two-dimensional materials optically counting layers.