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10 May 2010 Enhanced transmission of s-polarized light through a metal slit
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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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Mickaël Guillaumée, Alexey Yu. Nikitin, L. Andrea Dunbar, Vladislav Spassov, Mona J. K. Klein, Rolf Eckert, Luis Martín-Moreno, Francisco J. García-Vidal, and Ross P. Stanley "Enhanced transmission of s-polarized light through a metal slit", Proc. SPIE 7712, Nanophotonics III, 771238 (10 May 2010);

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