Figure 3
From: Tunable graphene-based hybrid plasmonic modulators for subwavelength confinement

The structure and mode distributions of the designed GHPM. (a) Three dimensional structure and cross section of the proposed hybrid modulator. (b) The mode distributions of the designed modulator at a 1550 nm wavelength where d = 200 nm, h = 4 nm and hd = 50 nm.