A Superfocusing Plasmonic Plate with Physically Achievable Extreme Sizes

Based on the effect of radiationless electromagnetic interference (REI), a dual-foci superfocusing is achieved using a plasmonic array with a physically realizable extreme size of 0.195λ, where λ is the free-space wavelength). The full widths at half maximum (FWHM) of both electric and magnetic fields are 0.061λ and 0.052λ at a distance of 0.1λ.