Optical transmittance of multilayer graphene
1 Micro & Nano Engineering Laboratory, Department of Precision and Microsystems Engineering, Delft University of Technology - Mekelweg 2, 2628CD, Delft, The Netherlands
2 Radboud University of Nijmegen, Institute for Molecules and Materials - Heijendaalseweg 135, 6525AJ, Nijmegen, The Netherlands
Received: 18 August 2014
Accepted: 16 September 2014
We study the optical transmittance of multilayer graphene films up to 65 layers thick. By combing large-scale tight-binding simulation and optical measurement on CVD multilayer graphene, the optical transmission through graphene films in the visible region is found to be solely determined by the number of graphene layers. We argue that the optical transmittance measurement is more reliable in the determination of the number of layers than the commonly used the Raman spectroscopy. Moreover, the optical transmittance measurement can be applied also to other 2D materials with weak van der Waals interlayer interaction.
PACS: 78.67.Wj – Optical properties of graphene / 72.80.Vp – Electronic transport in graphene / 73.22.Pr – Electronic structure of graphene
© EPLA, 2014