A versatile material model for the FDTD simulation of graphene

A complex conjugate pole-residue pair model has been developed and is presented for use in finite-difference time domain simulation of graphene based photonic and plasmonic devices, The updating scheme is quite simple, the parameters can be easily obtained through a vector fitting process. The resulting model can provides an accurate spectral representation of the effective permittivity in a quite large wavelength range. Both intraband and interband contribution are included in this model. Some numerical simulation results are provided to validate the effectivity and accuracy of this method.