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

J. Salvi (1) , M. Roussey (1) , F. Baida (1) , M.-P. Bernal (1) , Arnaud Mussot (1) , T. Sylvestre (1) , H. Maillotte (1) , D. van Labeke (1) , A. Perentes (2) , I. Utke (2) , C. Sandu (2) , P. Hoffmann (2) , B. Dwir (2)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 EPFL - Ecole Polytechnique Fédérale de Lausanne

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. B67, 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.

Domaines: Optique / photonique

J. Salvi, M. Roussey, F. Baida, M.-P. Bernal, Arnaud Mussot, et al.. Annular aperture arrays: study in the visible region of the electromagnetic spectrum. Optics Letters, 2005, 30 (13), pp.1611-1613. ⟨10.1364/OL.30.001611⟩. ⟨hal-00096494⟩