Physics – Condensed Matter – Materials Science
Scientific paper
2003-10-30
Photonics and Nanostructures 1, 55 (2003)
Physics
Condensed Matter
Materials Science
Accepted for publication in Photonics and Nanostructures
Scientific paper
10.1016/j.photonics.2003.08.001
In this paper we explore the transmission properties of single subwavelength apertures perforated in thin metallic films flanked by asymmetric configurations of periodic arrays of indentations. It is shown how the corrugation in the input side can be used to transmit selectively only two different wavelengths. Also, by tuning the geometrical parameters defining the corrugation of the output side, these two chosen wavelengths can emerge from the structure as two very narrow beams propagating at well-defined directions. This new ability of structured metals can be used as a base to build micron-sized wavelength de-multiplexers.
Bravo-Abad Jorge
Garcia-Vidal Francisco J.
Martin-Moreno Luis
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