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Title

How light emerges from an illuminated array of subwavelength holes

AuthorsBravo-Abad, Jorge; García-Vidal, F. J.; Martín-Moreno, Luis
Issue DateFeb-2006
PublisherNature Publishing Group
CitationNature Physics 2(2): 120-123 (2006)
AbstractThe extraordinary optical transmission through periodic arrays of subwavelength holes has been studied extensively since it was first reported in 1998, owing to both its fundamental implications and its technological potential. The picture of the underlying mechanism that emerges from most of the theoretical studies is a resonant process assisted by surface electromagnetic modes, such as surface plasmons. However, these studies consider an infinite array of holes. By combining experiment and theory, we have analysed the influence of the inherent finite size of the arrays and report here the unexpected spatial distribution of light as it emerges from the arrays. This distribution is strongly anisotropic and extremely sensitive to the angle of incidence of the impinging light. The behaviour can be explained by a model that takes into account the asymmetry induced by the array edges, and the effects this has on the emission pattern across the array.
Description4 pages, 4 figures.-- et al.
Publisher version (URL)http://dx.doi.org/10.1038/nphys213
URIhttp://hdl.handle.net/10261/19702
DOI10.1038/nphys213
ISSN1745-2473
Appears in Collections:(ICMA) Artículos
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