Plasmonic demultiplexer based on induced transparency resonances: Analytical and numerical study | El Boudouti, E.H.
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Plasmonic demultiplexer based on induced transparency resonances: Analytical and numerical study

Archive ouverte : Communication dans un congrès

El Boudouti, E.H. | Djafari-Rouhani, Bahram | Amrani, M. | Khattou, S. | Noual, A.

Edité par HAL CCSD ; Springer

International audience. We study both analytically and numerically the possibility to realize a simple plasmonic Y-shaped demultiplexer made of an input line and two output lines. Each line consisting of a metal-insulator-metal (MIM) waveguide contains a specific resonator made of two stubs grafted at a given position from the input line. The two stubs on each line induce a plasmonic induced transparency (PIT) resonance in the transmission spectra characterized by a resonance squeezed between two zeros. The idea consists in coinciding at a given wavelength, a resonance on one line with a transmission zero on the other line. We give closed-form expressions of the geometrical parameters allowing the selective transfer of a single mode in one line without affecting the other line. The analytical results, obtained by means of the Green’s function method, are confirmed by numerical simulation using finite element method via Comsol Multiphysics software.

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