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arXiv · 0912.2452

Observation of enhanced transmission for s-polarized light through a subwavelength slit

M. Guillaumee·A. Yu. Nikitin·M. J. K. Klein·L. A. Dunbar·V. Spassov·R. Eckert·L. Martin-Moreno·F. J. Garcia-Vidal·R. P. Stanley
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Abstract

Enhanced optical transmission (EOT) through subwavelength apertures is usually obtained for p-polarized light. The present study experimentally investigates EOT for s-polarized light. A subwavelength slit surrounded on each side by periodic grooves has been fabricated in a gold film and covered by a thin dielectric layer. The excitation of s-polarized dielectric waveguide modes inside the dielectric film strongly increases the s-polarized transmission. Transmission measurements are compared with a coupled mode model and show good qualitative agreement. Adding a waveguide can improve light transmission through subwavelength apertures, as both s and p-polarization can be efficiently transmitted.

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M. Guillaumee, A. Yu. Nikitin, M. J. K. Klein, L. A. Dunbar, V. Spassov, R. Eckert, L. Martin-Moreno, F. J. Garcia-Vidal, R. P. Stanley. 2009-12-12. Observation of enhanced transmission for s-polarized light through a subwavelength slit. https://doi.org/10.1364/oe.18.009722

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