Multiple Fano Resonances in Plasmonic Waveguide-Based Cavity and Detection of Pathogenic Virus

The excitation and tuning of multiple resonances with narrow spectral width based on Brewster's effect is possible in an ultrathin dual-band terahertz absorber. The angular variation establishes a monotonic relation with the frequency of some generated resonances offering tunability. Moreover, burying a graphene ring resonator beneath the metallic ring splits the resonance for providing the triple narrow absorption windows. The electrical modulation offers the feature of independent tunability in the generated third absorption band. Thus, the frequency ratio of the upper to lower spectral absorption peak can be modulated by the electrically tunable Fermi energy of graphene. Engraving the graphene resonator also enhances the incident angle based tunability by affecting a greater number of Brewster generated resonance peaks. The narrow line shape of the triple band absorption can enable refractive index sensing and the detection of extraneous elements in localized analyte samples. The detection of imidacloprid pesticide in wheat flour is performed by the implemented sensor. The numerical analysis is done for the design and analysis of the absorber structures to report the above facts.

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Multiple Fano Resonances in Plasmonic Waveguide-Based Cavity and Detection of Pathogenic Virus

Cited by 9 publications

References 53 publications

High sensitivity plasmonic refractive index sensor for early anaemia detection

High sensitivity plasmonic refractive index sensor for early anaemia detection

Nanorods-enhanced MIM plasmonic sensor based on S-shaped waveguide coupled with ohm-shaped and D-shaped resonators

Numerical analysis of the Brewster-electrical duo-effect for multi-resonance tuning in THz absorber

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