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Proceedings Paper

Localised modes of sub-wavelength hole arrays in thin metal films
Author(s): J. Parsons; E. Hendry; B. Auguié; W. L. Barnes; J. R. Sambles
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Paper Abstract

When perforated metal films are sufficiently thin, in addition to exciting surface plasmon-polariton (SPP) modes by conventional two dimensional grating scattering, there is also the possibility of coupling to the localised modes associated with the holes. Here, experimental transmission spectra are obtained from focused ion beam fabricated hole arrays exhibiting localized modes in the visible frequency region. We employ both analytical and numerical (finite element) modeling to understand the fundamental properties of the localized mode. Finally, the sensitivity of the optical response to changes in refractive index is explored, and its potential for sensing applications is discussed.

Paper Details

Date Published: 23 April 2008
PDF: 8 pages
Proc. SPIE 6988, Nanophotonics II, 69880Y (23 April 2008); doi: 10.1117/12.780465
Show Author Affiliations
J. Parsons, Univ. of Exeter (United Kingdom)
E. Hendry, Univ. of Exeter (United Kingdom)
B. Auguié, Univ. of Exeter (United Kingdom)
W. L. Barnes, Univ. of Exeter (United Kingdom)
J. R. Sambles, Univ. of Exeter (United Kingdom)


Published in SPIE Proceedings Vol. 6988:
Nanophotonics II
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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