Figure 2
From: Tunable pattern-free graphene nanoplasmonic waveguides on trenched silicon substrate
Width dependence of (a) the real part of the effective index, Real(neff), (b) the propagation loss and (c) the effective mode width and FOM for the proposed GPWG when d1 = 300 nm, d2 = 100 nm, EF1 = 0.3 eV and EF2 = 0.52 eV.
The insets of (a) display typical electric field profiles for the guided-modes. The squares and dashed lines indicate the values when w = 0 and w → ∞, respectively.
