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Fig. 1. (Color online) Schematic description of our FDTD simulation on transmission through a thin metallic film. Left: When metal film is extremely sub-wavelength-thick, mesh size cannot become comparable to the thickness due to limitations in computational resources. Right: One may obtain consistent results by assuming that the metal film is one mesh-thick with a modified effective conductivity σeff.
New Phys.: Sae Mulli 2022;72:748~753