New double V‐groove plasmonic waveguide for electro‐optic modulator

In this study, a novel plasmonic waveguide structure consisting of two mutually positioned V‐grooves for using as an electro‐optic phase modulator has been designed. The key challenge in designing an active plasmonic channel is that the bias field distribution should properly overlap the plasmonic field distribution. The active performance of the waveguide structure has been studied in a single electro‐optic phase modulator and also in an all‐plasmonic Mach–Zehnder structure. A new plasmonic splitter has been also proposed and analysed for using in the Mach–Zehnder structure. A high overlapping of bias field and plasmonic field along with low loss of 0.22 dB/µm, low value of U π L π  = 0.1 V mm, high bandwidth and high extinction ratio of 32 dB has been achieved simultaneously through the authors' new proposed plasmonic waveguide structure.