Enhanced transmission of slit arrays in an extremely thin metallic film
Antoine Moreau, Christophe Lafarge, Nicolas Laurent, Kofi Edee, Gérard Granet
Abstract
Horizontal resonances of slit arrays are studied. They can lead to an enhanced transmission that cannot be explained using the single-mode approximation. A new type of cavity resonance is found when the slits are narrow for a wavelength very close to the period. It can be excited for very low thicknesses. Optimization shows these structures could constitute interesting monochromatic filters.
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