Optical properties of tungsten thin films perforated with a bidimensional array of subwavelength holes

Abstract

We present a theorical investigation of the optical transmission of a dielectric grating carved in a tungsten layer. For appropriate wavelengths tungsten shows indeed a dielectric behaviour. Our numerical simulations leads to theoretical results similar to those found with metallic systems studied in earlier works. The interpretation of our results rests on the idea that the transmission is correlated with the resonant response of eigenmodes coupled to evanescent diffraction orders.

4 pages, 3 figures

References in corpus (2)

• Transmission resonances on metallic gratings with very narrow slits
• Role of Wood anomalies in optical properties of thin metallic films with a bidimensional array of subwavelength holes

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• Fundamental mechanism underlying subwavelength optics of metamaterials: Charge oscillation-induced light emission and interference
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• Propagation of localized surface plasmons in sets of metallic nanocylinders at the exit of subwavelength slits
• Wood's anomalies and excitation of cyclic Sommerfeld resonances under plane wave scattering from a single dielectric cylinder at oblique incidence of light