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Opt Lett. 2005 Jul 1;30(13):1611-3.

Annular aperture arrays: study in the visible region of the electromagnetic spectrum.

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  • 1FEMTO-SIT UMR 6174, Département d'Optique P. M. Duffieux, Université de Franche-Comté, 16 Route de Gray, 25030 Besançon Cedex, France.


Baida and Van Labeke recently proposed a structure that exhibits a supertransmission of light through an array of nanometric coaxial apertures in a metallic film that has been named an annular aperture array (AAA) [Opt. Commun. 209, 17 (2002); Phys. Rev. B 67, 155314 (2003); J. Microsc. 213, 140 (2003)]. We present the first experimental study, to our knowledge, of an AAA structure in the visible region. For technological reasons, the structure under study does not produce a supertransmission of 80% as in Baida and Van Labeke [Opt. Commun. 209, 17 (2002)]. We built the nanostructure and experimentally recorded its far-field spectral response. This transmission shows only one broad band with a maximum around lambda = 700 nm, giving a maximum efficiency around 17%. A finite-difference time-domain simulation reproduces quite well the obtained transmission spectrum.

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