Fig. 1 | npj 2D Materials and Applications

Fig. 1

From: Measurements of electrically tunable refractive index of MoS2 monolayer and its usage in optical modulators

Fig. 1

Effect of interference on the electrical modulation of the reflectance in Au/Si3N4/MoS2 hybrid waveguide nanostructure. a Schematic illustration of the device structure and principle of ellipsometric measurements. b The enhancement of the absorption in the MoS2 monolayer due to multiple internal reflections at each interface of the Au/Si3N4/MoS2 hybrid waveguide nanostructure. c Optical microscopy image of typical devices showing the top MoS2 monolayer covering. d Contact-mode AFM of the device confirms monolayer nature of MoS2

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