Results of electromagnetic field analysis of the
designed nanopinhole-based plasmonic structure with fixed ratio δ = 1.25 for different incident wavelengths. (a) -field intensity distribution along -axis. The inset plot of distribution at - plane shows the
central transmission peaks. (b) -field intensity distribution along -axis. The central transmission
peaks are shown more clearly in the inset plot of distribution
at - plane for 400 nm incident wavelength. Inset 2D image is -field
intensity distribution at - plane.
