Fig. 1. (a) Schematic of integrated hybrid plasmonic–photonic wavelength DMUX. The difference in CWs’ functional roles evidenced by color. (b) Frequency dependence of effective refractive index of the hybrid plasmonic–photonic waveguide for different values of CW lengths: 140 nm, 190 nm, and 220 nm considered here.

Fig. 2. HFSS modeling results for 1.3/1.6 μm hybrid plasmonic–photonic DMUX. Distribution of propagating light intensity at different wavelengths: (a) f=185  THz (λ=1.62  μm); (b) f=230  THz (λ=1.3  μm).

Fig. 3. SEM image of a fabricated DMUX.

Fig. 4. Schematic of the end-fire optical bench setup.

Fig. 5. Experimental results: (a) colormap of light intensity distribution as a function of wavelength for a hybrid plasmonic–photonic DMUX; (b) distribution of light intensity in the output arms at 1355 nm and 1655 nm wavelengths.