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

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...

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Bibliographic Details
Main Authors:	Guillaumee, M, Nikitin, A. Yu, Klein, M. J. K, Dunbar, L. A, Spassov, V, Eckert, R, Martin-Moreno, L, Garcia-Vidal, F. J, Stanley, R. P
Format:	Journal Article
Language:	English
Published:	12-12-2009
Subjects:	Physics - Mesoscale and Nanoscale Physics Physics - Other Condensed Matter
Online Access:	Get full text
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Summary:	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.
DOI:	10.48550/arxiv.0912.2452