Terahertz Plasmonic Metamaterial Based Multi-band Band-Pass Filter Using Micro-Ring Resonator

This paper reports the design and theoretical analysis of the spoof plasmonic metamaterial based multi-band band-pass filter (BPF) using corrugated planar micro-ring resonator at THz frequency. Plasmonic metamaterial i.e. spoof surface plasmon polaritons structures support EM mode at the interface of the metal-dielectric and thus highly confined and localized E-field can be obtained. Due to this sub-wavelength field confinement, spoof SPP structures show low-loss, low crosstalk and low mutual coupling and is being used for developing the compact integrated circuits. Sub-wavelength rectangular grooves are corrugated on the metallic planar ring is fed through the spoof SPP transmission line at its input and output ports to provide a band-pass response. The detailed mathematical analysis is provided for the designed band-pass filter. The Full wave EM simulation is performed to obtain the reflection and transmission coefficient. The designed spoof plasmonic ring resonator will provide a path to design and development of the plasmonic sensors.