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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2026-03-24
Design of a Tunable Wide-Stopband Plasmonic Filter Based on a Metal-Insulator-Metal (MIM) Waveguide for Mid-Infrared Applications
By
Ahmed Lounis,

    Mr. Ahmed Lounis

    Department of Electronics

    University of M'Sila

    Algeria

    Homepage

Imane Zegaar,

    Dr. Imane Zegaar

    University of Mhamed Bougara Boumerdes

    Algeria

    Homepage

Hocine Bensalah,

    Dr. Hocine Bensalah

    Department of Electronics

    University of M'Sila

    Algeria

    Homepage

Abdesselam Hocini

    Professor Abdesselam Hocini

    Department of Electronics

    University of M'Sila

    Algeria

    Homepage

Progress In Electromagnetics Research Letters, Vol. 130, 9-14, 2026
doi:10.2528/PIERL25072504 | Google Scholar

Abstract
Wide-stopband plasmonic filters are essential components in compact mid-infrared (MIR) photonic systems. This work proposes a geometrically tunable wide-stopband plasmonic filter based on a metal-insulator-metal (MIM) waveguide with dual resonator cavities. The optical response is numerically investigated using the two-dimensional finite-difference time-domain (2D FDTD) method. The influence of the resonator height H2 and the inter-cavity distance D on the stopband characteristics is analyzed. The symmetric dual-cavity configuration enables effective control of the stopband bandwidth and central wavelength. The design achieves a significantly broadened stopband while maintaining compactness and high transmission selectivity, making it a promising candidate for integration into mid-infrared photonic and sensing systems.
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Citation
Ahmed Lounis, Imane Zegaar, Hocine Bensalah, and Abdesselam Hocini, "Design of a Tunable Wide-Stopband Plasmonic Filter Based on a Metal-Insulator-Metal (MIM) Waveguide for Mid-Infrared Applications," Progress In Electromagnetics Research Letters, Vol. 130, 9-14, 2026.
doi:10.2528/PIERL25072504
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