Metal–dielectric–metal waveguide-based broadband plasmonic filter in visible spectral range

Buzheng Wei; Shuisheng Jian

doi:10.1117/1.JNP.11.046003

12 October 2017 Metal–dielectric–metal waveguide-based broadband plasmonic filter in visible spectral range

Buzheng Wei, Shuisheng Jian

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 4, 046003 (October 2017). https://doi.org/10.1117/1.JNP.11.046003

Abstract

A broadband band-stop filter based on a multiple side-coupled metal–dielectric–metal slots waveguide is analytically designed and numerically investigated. Beginning with a single-side-coupled slot, we use the dispersion equation and resonant condition to locate the stop band at the visible regime and achieve a narrow stop band filter. Then, we cascade several slots to enlarge the stop band to 2.5 times wider than the single-slot condition. Next, if the height of the slots is gradiently distributed, multiple stop bands will exist. Finally, as a refractive index sensor, the figure of merit of this structure as a sensor reaches 550 nm/RIU. This optimization design process significantly paves the way for high efficient filter or sensor production and fabrication in the visible range in practical scientific or engineering works.

Citation Download Citation

Buzheng Wei and Shuisheng Jian "Metal–dielectric–metal waveguide-based broadband plasmonic filter in visible spectral range," Journal of Nanophotonics 11(4), 046003 (12 October 2017). https://doi.org/10.1117/1.JNP.11.046003

Received: 15 June 2017; Accepted: 26 September 2017; Published: 12 October 2017

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