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A structure for narrow-band coupler type plasmonic filter and wavelength de-multiplexer
conference contributionposted on 2023-02-06, 03:27 authored by Md Shamsul Arefin, S Raju
The authors present a structure for coupler type narrow-band infrared filter and a wavelength de-multiplexer that is tunable by device parameters. Numerical simulation is realized in a two-dimensional (2D) plasmon polariton metal using finite difference time domain (FDTD) method with a perfectly matched layers (PMLs) boundary conditions. The filter can be used as a selective and rejection type plasmonic filter simultaneously; this is a unique feature of this filter structure. The tunable characteristics of the central wavelength of the filter are discussed. By using the filter, design of a 1×3 wavelength de-multiplexer is also outlined. © 2012 IEEE.