Annular aperture arrays: study in the visible region of the electromagnetic spectrum.
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.
Salvi
J
J
FEMTO-SIT UMR 6174, Département d'Optique P. M. Duffieux, Université de Franche-Comté, 16 Route de Gray, 25030 Besançon Cedex, France.
Roussey
M
M
Baida
F I
FI
Bernal
M P
MP
Mussot
A
A
Sylvestre
T
T
Maillotte
H
H
Van Labeke
D
D
Perentes
A
A
Utke
I
I
Sandu
C
C
Hoffmann
P
P
Dwir
B
B