Coupled surface plasmon polaritons on thin metal slabs corrugated on both surfaces

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Coupled surface plasmon polaritons on thin metal slabs corrugated on both surfaces

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Title: Coupled surface plasmon polaritons on thin metal slabs corrugated on both surfaces
Author: Hooper, Ian R.
Sambles, J. Roy
Citation: 70 (4), article 045421
Publisher: American Physical Society
Journal: Physical Review B
Date Issued: 2004
URI: http://hdl.handle.net/10036/31452
DOI: 10.1103/PhysRevB.70.045421
Links: http://dx.doi.org/10.1103/PhysRevB.70.045421 http://link.aps.org/abstract/PRB/v70/e045421
Abstract: A modelling study of the effect of coupled surface plasmon polaritons (SPPs) on the optical response of a thin metal film corrugated on both surfaces is presented. Initially the case of conformally corrugated metal films (the corrugations on each surface are identical and in phase with each other) is considered. Sinusoidal structures, and those having an additional first harmonic, 2kg (where kg is the grating vector) component, are investigated. This 2kg component opens up significant band gaps in the SPP dispersion curves, and also causes anticrossing behavior between the long range SPPs and short range SPPs. It is shown that this anticrossing, and the band gap, have a common explanation. Following this, nonconformally corrugated films are examined, and strongly enhanced resonant transmission is shown to occur, which can be almost independent of the in-plane wave vector. The results presented show that, though the enhanced transmission through hole arrays which has provoked extensive recent investigation is of great interest from a physics viewpoint, other structures which exhibit enhanced transmission may provide more benefits, including higher transmission, for some applications.
Type: Article
Description: Ian R. Hooper and J. Roy Sambles, Physical Review B, Vol. 70, article 045421 (2004). "Copyright © 2004 by the American Physical Society."
ISSN: 1098-01211550-235X


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