Importance of diffraction in determining the dispersion of designer surface plasmons

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Importance of diffraction in determining the dispersion of designer surface plasmons

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dc.contributor.author Hendry, Euan en_GB
dc.contributor.author Hibbins, Alastair P. en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.department University of Exeter en_GB
dc.date.accessioned 2009-01-27T16:23:07Z en_GB
dc.date.accessioned 2011-01-25T11:54:36Z en_US
dc.date.accessioned 2013-03-20T13:19:33Z
dc.date.issued 2008 en_GB
dc.description.abstract By employing a modified modal matching approach, we obtain explicit analytical expressions relating frequency to in-plane wave vector for the surface electromagnetic mode confined at the interface between vacuum and a perfect conductor patterned with a two-dimensional square array of square holes. Our complete analytical formalism takes into account both multiple order waveguide modes and diffracted evanescent waves, hence overcoming the a priori assumptions intrinsic to previous descriptions of the dispersion of these surface waves. We validate our derived dispersion relation through comparison with that recently recorded at microwave frequencies using prism coupling. Finally, we show that diffracted evanescent waves play an important role in determining the dispersion, so that the electric field associated with “designer” surface modes is much more weakly confined to the interface than the field associated with surface plasmons on real metal surfaces. en_GB
dc.identifier.citation 78 (23), article 235426 en_GB
dc.identifier.doi 10.1103/PhysRevB.78.235426 en_GB
dc.identifier.uri http://hdl.handle.net/10036/48074 en_GB
dc.language.iso en en_GB
dc.publisher American Physical Society en_GB
dc.relation.url http://dx.doi.org/10.1103/PhysRevB.78.235426 en_GB
dc.relation.url http://link.aps.org/doi/10.1103/PhysRevB.78.235426 en_GB
dc.subject light diffraction en_GB
dc.subject optical couplers en_GB
dc.subject optical prisms en_GB
dc.subject optical waveguides en_GB
dc.subject surface electromagnetic waves en_GB
dc.subject surface plasmons en_GB
dc.title Importance of diffraction in determining the dispersion of designer surface plasmons en_GB
dc.type Article en_GB
dc.date.available 2009-01-27T16:23:07Z en_GB
dc.date.available 2011-01-25T11:54:36Z en_US
dc.date.available 2013-03-20T13:19:33Z
dc.identifier.issn 1098-0121 en_GB
dc.identifier.issn 1550-235X en_GB
dc.description Euan Hendry, Alastair P. Hibbins, and J. Roy Sambles, Physical Review B, Vol. 78, article 235426 (2008). Copyright © 2008 by the American Physical Society. en_GB
dc.identifier.journal Physical Review B en_GB


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