Design of a Band-Stop Filter Based on Metal–Insulator–Metal (MIM) Plasmonic Structures
DOI:
https://doi.org/10.67603/jaate.v1i02.10444Keywords:
Surface plasmons polaritons, FDTD method,, stopband filter, Metal–insulator–metal waveguideAbstract
In this paper, a controllable stop-band filter based on an MIM waveguide-coupled resonator cavity is proposed for ultra-wideband (UWB) applications. The designed filter is simulated and analyzed in the mid-infrared region. The transmittance spectrum of this filter was generated using R-Soft CAD software employing the 2D Finite-Difference Time-Domain (FDTD) method. To enhance the performance of the proposed filter, the wavelength filtering range was broadened by incorporating a second resonator on the opposite side, separated by an optimized distance D between the two cavities. To further improve the filter characteristics, a third and fourth cavity were added, resulting in a wider bandgap width. This topology finds frequent applications in highly integrated photonic circuits.
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