NDLI: 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

Content Provider	Semantic Scholar
Author	Lockyear, Matthew J. Hibbins, Alastair P. Sambles, John Roy Lawrence, Christopher Robert
Copyright Year	2004
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.
Starting Page	2040
Ending Page	2042
Page Count	3
File Format	PDF HTM / HTML
DOI	10.1063/1.1688001
Volume Number	84
Alternate Webpage(s)	https://ore.exeter.ac.uk/repository/bitstream/handle/10036/23692/Surface-topography-induced.pdf;sequence=5
Alternate Webpage(s)	http://m-newton.ex.ac.uk/research/emag/pubs/pdf/ApplPhysLett_84_2040.pdf
Alternate Webpage(s)	https://doi.org/10.1063/1.1688001
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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