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research article

On the Plane Wave-Excited Subwavelength Circular Aperture in a Thin Perfectly Conducting Flat Screen

Michalski, Krzysztof
•
Mosig, Juan  
2014
IEEE Transactions on Antennas and Propagation

The electromagnetic field transmitted by a subwavelength circular aperture in a perfectly conducting screen of infinitesimal thickness and illuminated by an obliquely incident plane wave is analyzed based on the Bethe-Bouwkamp quasi-static model of the field in the aperture plane. The problem is formulated in the spectral domain and the solution is expressed in terms of a minimum number of one-dimensional Hankel-transform integrals involving products of Bessel functions and spherical Bessel functions. An efficient computational scheme for these integrals is implemented, based on numerical quadrature with convergence acceleration by extrapolation. From the rigorous spectral domain formulation, closed form expressions are also derived for the transmitted near-zone and far-zone fields. Sample numerical results are presented to demonstrate the validity of the method and its utility in the modeling of aperture-type near-field optical probes.

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Type
research article
DOI
10.1109/TAP.2014.2302839
Web of Science ID

WOS:000334744700036

Author(s)
Michalski, Krzysztof
•
Mosig, Juan  
Date Issued

2014

Publisher

Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Antennas and Propagation
Volume

62

Issue

4

Start page

2121

End page

2129

Subjects

Bethe-Bouwkamp model

•

Subwavelength aperture

•

near-field optical probe

•

spectral domain method

Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
LEMA  
Available on Infoscience
January 20, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/99930
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