Feedback Effects in Plasmonic Slot Waveguides Examined Using a Closed Form Model

Analysis of the feedback effects in plasmonic waveguides is carried out using an analytical model. The closed-form model is extracted from the waveguide physical parameters is simple, accurate, and provides insight into understanding the feedback effects in plasmonic waveguide structures. These feedback effects are utilized to obtain various filter functions using the same base structures, with exceptional tolerance to fabrication imperfections in comparison to its plasmonic and dielectric counterparts.