Figure 5
Comparison of \(|E_x(x,z=0)|\), normalized to the incident \(E_x\) in a unit cell on the graphene grating surface using the FMM with ABC (dotted curve in red colour) and our approach incorporating LBFs in FMM (solid curve in blue colour). The operating frequency and incident angle are 2.5 THz and \(\theta =0{^{\circ}}\), respectively. The truncated order is \(N=100\). The region for \(x\in [0,20\,\upmu m]\) is in the graphene strip; otherwise is in the slit region.
