work from 1420 nm to 1980 nm (560 nm bandwidth) is proposed in this work. The splitter has
an extinction ratio lower than− 20 dB over a large bandwidth with a total length of 254.6 μm.
The key principle of operation of the splitter is the induced change in the refractive index of
the y-odd mode when it is coupled to the second order plasmonic mode, while other
supermodes are weakly affected by the plasmonic mode. The proposed broadband and …