Surface-topography-induced enhanced transmission and directivity of microwave radiation through a subwavelength circular metal aperture

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Surface-topography-induced enhanced transmission and directivity of microwave radiation through a subwavelength circular metal aperture

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dc.contributor.author Lockyear, Matthew J. en_GB
dc.contributor.author Hibbins, Alastair P. en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.author Lawrence, Christopher R. en_GB
dc.contributor.department University of Exeter; QinetiQ Ltd, Farnborough en_GB
dc.date.accessioned 2008-04-17T15:27:11Z en_GB
dc.date.accessioned 2011-01-25T11:53:44Z en_US
dc.date.accessioned 2013-03-20T13:19:42Z
dc.date.issued 2004 en_GB
dc.description.abstract Strongly enhanced transmission of microwave radiation (λ0~5 mm) is observed through a single subwavelength circular aperture of diameter d = 2.5 mm in a metallic plate. The phenomenon is caused by resonant excitation of electromagnetic surface waves supported by four concentric grooves surrounding the aperture on the illuminated side of the sample. It is also shown that similar surface patterning on the output face of the sample results in very strong angular confinement (directivity) of the transmitted beam. A finite element code is used to investigate the electromagnetic fields on both the illuminated and the exit side of the structure, the predictions from which show excellent agreement with the experimental results. en_GB
dc.identifier.citation 84 (12), pp. 2040-2042 en_GB
dc.identifier.doi 10.1063/1.1688001 en_GB
dc.identifier.uri http://hdl.handle.net/10036/23692 en_GB
dc.language.iso en en_GB
dc.publisher American Institute of Physics en_GB
dc.relation.url http://dx.doi.org/10.1063/1.1688001 en_GB
dc.relation.url http://link.aip.org/link/?APPLAB/84/2040/1 en_GB
dc.subject microwave propagation en_GB
dc.subject electromagnetic wave transmission en_GB
dc.subject finite element analysis en_GB
dc.subject electromagnetic wave propagation en_GB
dc.subject radiowave propagation en_GB
dc.title Surface-topography-induced enhanced transmission and directivity of microwave radiation through a subwavelength circular metal aperture en_GB
dc.type Article en_GB
dc.date.available 2008-04-17T15:27:11Z en_GB
dc.date.available 2011-01-25T11:53:44Z en_US
dc.date.available 2013-03-20T13:19:42Z
dc.identifier.issn 0003-6951 en_GB
dc.description Copyright © 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 84 (2004) and may be found at http://link.aip.org/link/?APPLAB/84/2040/1 en_GB
dc.identifier.journal Applied Physics Letters en_GB


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