Nanoscale Plasmonic Devices Based on Metal-Dielectric-Metal Stub Resonators
Figure 1
(a) Schematic of a MDM plasmonic waveguide side-coupled to two MDM stub resonators. (b) Schematic defining the reflection coefficient and transmission coefficients , , when the fundamental TM mode of the MDM waveguide is incident at a waveguide crossing. Note that due to symmetry. (c) Schematic defining the reflection coefficient of the fundamental TM mode of the MDM waveguide at the boundary of a short-circuited MDM waveguide. (d) Transmission spectra for the structure of (a) calculated using FDFD (circles), transmission line theory (solid blue line), and scattering matrix theory (solid red line) for a silver-air structure with nm. Also shown are the reflection (solid green line) and absorption (solid cyan line) spectra calculated using FDFD. Results are shown for nm, nm. ((e)–(g)) Magnetic field profiles for the structure of (a) for nm, nm, nm at , 299, 194 THz, when the fundamental TM mode of the MDM waveguide is incident from the left.
