Multiple Fano interferences in a plasmonic metamolecule consisting of asymmetric metallic nanodimers
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Date
2015
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Abstract
We theoretically explore signatures of plasmonic Fano interferences in a subwavelength
plasmonic metamolecule consisting of closely packed asymmetric gold nanodimers, which
lead to the possibility of generating multiple Fano resonances in the scattering spectrum.
This spectral feature is attributed to the interference between bright and dark plasmonic
modes sustained by the constituent nanodimers. The excited Fano dips are highly sensitive in
both wavelength and amplitude to geometry and background dielectric medium. The
tunability of induced Fano resonances associated with enhanced electric fields from the
visible to infrared region provides promising applications, particularly in refractive index
sensing, light-trapping, and photon up-converting
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Keywords
Multiple Fano; plasmonic metamolecule; asymmetric metallic nanodimers