Journal
OPTICS LETTERS
Volume 34, Issue 13, Pages 2003-2005Publisher
Optica Publishing Group
DOI: 10.1364/OL.34.002003
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Funding
- Swedish research council
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Extraordinary transmission through subwavelength apertures is usually observed in a narrow bandwidth range, and the transmission Outside this range is low, in agreement with classical results. The analysis presented here is based oil the Babinet's principle and hence scattering by the complementary structure, where the apertures are replaced by finite scatterers. It is shown that the transmission cross section of a set of apertures in an opaque screen satisfies a sum rule that relates the transmission cross section integrated over all wavelengths with the polarizability of the complementary structure as defined by Babinet's, principle. The theoretical results are illustrated with numerical examples. (C) 2009 Optical Society of America
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