The Study Of Relative Difference of Electron Density Between Two Layers In Double_layer Graphene, On Optical Conductivity, And Comparing With Bi_layer Graphene

In this paper the structure of double_ and bi_ layer graphene systems are explained. Then using polarizability, and dielectric tensor, the total Optical Conductivities in double layer graphene, has been calculated, with the distance between two layers to be d=10 nm. Then total optical coductivity has been ploted numercally as a function of photon energy for double and bi_layer graphene systems, in constant broadening width, and different electron densities of layers. Finally results are compared and discussed and evaluated. In our study ne1and ne2 respectivly denoted first and second layers electron density in double layer graphene,and ne is in bilayer one.