12 October 2017 Metal–dielectric–metal waveguide-based broadband plasmonic filter in visible spectral range
Author Affiliations +
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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Buzheng Wei, Buzheng Wei, Shuisheng Jian, 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 . Submission: Received: 15 June 2017; Accepted: 26 September 2017
Received: 15 June 2017; Accepted: 26 September 2017; Published: 12 October 2017
JOURNAL ARTICLE
8 PAGES


SHARE
Back to Top