Abstract:
Plasmonic devices have become one of the most attractive research interest in present times due to its capability to overcome few of the shortcomings of electronic devices. One of the major advantage offered by the plasmonic devices is its ability to overcome diffraction limit that arises due to miniaturization of the devices. Among various types of plasmonic devices, plasmonic filters have attracted the eyes of researchers recently. Filters like high pass, low pass and band pass filters are noteworthy among the filter designs. Here, one nanoscale plasmonic high pass filter and one band pass filter designs are proposed using metal-insulator-metal (MIM) waveguide. The nanoscale plasmonic high pass filter consists of inward and outward grating profiles which are apodized by super Gaussian function and the band pass filter consists of ring resonator. The frequency dependent model of the metal is developed using Lorentz-Drude model which is solved numerically using finite-difference time-domain (FDTD) simulation in order to calculate the transmission efficiency of the filter. Changing various design parameters, the comparison of performance is also analyzed. Moreover, the proposed design is easier to fabricate since the simple geometrical shape is proposed
