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

Please use this identifier to cite or link to this item: http://hdl.handle.net/10036/23692

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Title: Surface-topography-induced enhanced transmission and directivity of microwave radiation through a subwavelength circular metal aperture
Author: Lockyear, Matthew J.
Hibbins, Alastair P.
Sambles, J. Roy
Lawrence, Christopher R.
Citation: 84 (12), pp. 2040-2042
Publisher: American Institute of Physics
Journal: Applied Physics Letters
Date Issued: 2004
URI: http://hdl.handle.net/10036/23692
DOI: 10.1063/1.1688001
Links: http://dx.doi.org/10.1063/1.1688001 http://link.aip.org/link/?APPLAB/84/2040/1
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.
Type: Article
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
Keywords: microwave propagationelectromagnetic wave transmissionfinite element analysiselectromagnetic wave propagationradiowave propagation
ISSN: 0003-6951


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