Localised modes of sub-wavelength hole arrays in thin metal films

J. Parsons; E. Hendry; B. Auguié; W. L. Barnes; J. R. Sambles

doi:10.1117/12.780465

23 April 2008 Localised modes of sub-wavelength hole arrays in thin metal films

J. Parsons, E. Hendry, B. Auguié, W. L. Barnes, J. R. Sambles

Proceedings Volume 6988, Nanophotonics II; 69880Y (2008) https://doi.org/10.1117/12.780465
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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.

Citation Download Citation

J. Parsons, E. Hendry, B. Auguié, W. L. Barnes, and J. R. Sambles "Localised modes of sub-wavelength hole arrays in thin metal films", Proc. SPIE 6988, Nanophotonics II, 69880Y (23 April 2008); https://doi.org/10.1117/12.780465

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