Designing Plasmonic Sensors Using Babinet's Principle

Joseph A. Riley, Michl Horák,Vlastimil Křápek,Victor Pacheco-Pena

2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)（2023）

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摘要

Localised surface plasmons excited on nano-/microstructures acting as plasmonic nanoantennas [1]–[3] have attracted increased attention in recent years with their ability to strongly confine incident electromagnetic (EM) fields in the visible and near-infrared regime. LSP resonances excited on plasmonic structures have been shown to strongly enhance incident fields with subwavelength spatial resolutions close to their surface (the near field) [4]–[10]. Sensors have also benefited from research and innovation in plasmonics. This is due to the spectral position of LSP resonances being sensitive in plasmonic nanostructures to external changes such as variations in the thickness and refractive index of a nearby dielectric.

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关键词

Babinet principle,complementary structures,dielectric analyte,double cylindrical holes,double metallic cylinders,electric conductors,identical diffraction pattern,incident electromagnetic fields,localised surface plasmons,LSP resonances,metallic screen,near-infrared regime,opaque sheet,optical frequencies,plasmonic nanoantennas,plasmonic nanostructures,plasmonic sensors,refractive index,spectral variations,subwavelength spatial resolutions

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