Fig. 7
Energy density distributions at the transverse cross section plane and along the propagation direction of a a bare MNW without cladding, b a WS2-clad MNW, and c coupling from a bare MNW to a WS2-clad MNW at the excitonic resonance based on 3D simulations. For better visualization, energy densities are normalized and plotted in a color bar with saturation (for more information, see Additional file 1: Fig. S12). P1 and P2 represent the transverse cross section planes located at the positions indicated by the white dashed lines. Scale bars (right bottom white lines): 100 nm