Optical transmittance of multilayer graphene

Abstract

We study the optical transmittance of multilayer graphene films up to 65\nlayers thick. By combing large-scale tight-binding simulation and optical\nmeasurement on CVD multilayer graphene, the optical transmission through\ngraphene films in the visible region is found to be solely determined by the\nnumber of graphene layers. We argue that the optical transmittance measurement\nis more reliable in the determination of the number of layers than the commonly\nused Raman Spectroscopy. Moreover, optical transmittance measurement can be\napplied also to other 2D materials with weak van der Waals interlayer\ninteraction.\n