Analysis of T-shaped Plasmonic Nanogap Wavelength Filters

Photonic integrated circuits (PICs) have been a very active research area ever since the inception of integrated optics for the application of the wavelength division multiplexing networks. In this paper, we reported the T-shaped nano-gap resonator with the straight waveguide without the ring shape resonator, which is replaced with a straight waveguide, nano-metallic layer, T-shaped waveguide, and nano-gap. We investigated the resonant properties of the structure using the FDTD method. The results reveal that the proposed structure has the band-stop characteristic for PICs.