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Angle resolved transmission through metal hole gratings

AuthorsMariani, F.; León-Pérez, F. de; Vendel, K.J.A.; Martín-Moreno, Luis ; Exter, M. P. van
Issue Date2017
PublisherOptical Society of America
CitationOptics Express 25(8): 9061-9070 (2017)
AbstractWe present the first angle resolved measurements of extraordinary optical transmission (EOT) through hole array gratings in a gold film. Varying the lattice spacing of the arrays and looking at higher diffraction orders, we retrieve the angular emission pattern of the constituent holes with better signal to noise ratio than with single-hole experiments. We present a method to determine separately the angular dependence of the direct and resonant contribution to EOT by using the spectral features of the diffraction orders together with an established model. The comparison of our results with the known angular transmission of a single hole in a metal film yields a good agreement for s-polarized light. Deviations are found for illumination with p-polarized light and we address the discrepancy with Coupled Mode Model calculations and Finite Difference Time Domain simulations. These measured deviations are currently not fully understood.
Publisher version (URL)https://doi.org/10.1364/OE.25.009061
Appears in Collections:(ICMA) Artículos
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