Open AccessAngle resolved transmission through metal hole gratings
Author(s) -
F. Mariani,
Fernando de León-Pérez,
K.J.A. Vendel,
Luis MartínMoreno,
M. P. van Exter
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.009061
Subject(s) - optics , diffraction , diffraction grating , materials science , extraordinary optical transmission , transmission (telecommunications) , physics , diffraction efficiency , lattice (music) , surface plasmon , plasmon , surface plasmon polariton , electrical engineering , acoustics , engineering
We 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.