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Squeezing light through subwavelength slits: waveguide modes, plasmons, and optical vortices

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Abstract

We compute the light transmission through subwavelength slits in a metal plate with finite thickness and finite permittivity. The anomalous behaviour of the transmission is explained in terms of waveguiding and optical vortices. We also consider a two slits configuration, which can give rise to plasmon-assisted enhanced transmission.

© 2003 Optical Society of America

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