Substrate dependence of cyclotron resonance on large-area CVD graphene

•Energy of cyclotron resonance (CR) exhibits B-dependence on single-layer CVD graphene.•The CR behavior of the graphene is significantly affected by supporting substrate.•The band velocity of the graphene on GaAs substrate is enhanced from that on glass.

Cyclotron resonance has been investigated on single-layer large-area graphene which was synthesized by chemical vapor deposition. Absorption peaks of the cyclotron resonance are clearly observed on the graphene sample and these peak energies exhibit B-dependence in terms of an unequally spaced Landau Level structure in Dirac fermions. We find significant substrate dependence of the band velocity c˜. The derived c˜ of the sample on a GaAs substrate is enhanced by about 10% from that on a glass substrate which almost coincides with that of the multi-layer epitaxial graphene, indicating that the c˜ is strongly affected by the condition of the substrate.