Mode solvers for very thin long-range plasmonic waveguides
Résumé
We present two mode solvers applied to a very thin long-range plasmonic waveguide. We compare the guided mode complex effective index obtained either applying a Fourier modal method or calculating density of guided modes using the Green's dyad technique. We achieve good agreement for both effective indices and mode profiles. We also observe a different behaviour compared to long-range surface plasmon supported by thicker films.