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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 4 — Apr. 1, 2010
  • pp: 815–826

Electromagnetic scattering from multiple sub-wavelength apertures in metallic screens using the surface integral equation method

Babak Alavikia and Omar M. Ramahi  »View Author Affiliations


JOSA A, Vol. 27, Issue 4, pp. 815-826 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000815


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Abstract

This work presents a novel finite-element solution to the problem of scattering from multiple two-dimensional holes with side grating in infinite metallic walls. The formulation is based on using the surface integral equation with free-space Green’s function as the boundary constraint. The solution region is divided into interior regions containing each hole or cavity as a side grating and exterior region. The finite-element formulation is applied inside the interior regions to derive a linear system of equations associated with nodal field values. The surface integral equation is then applied at the opening of the holes as a boundary constraint to connect nodes on the boundaries to interior nodes. The technique presented here is highly efficient in terms of computing resources, versatile and accurate in comparison with previously published methods. The near and far fields are generated for different single and multiple hole examples.

© 2010 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(290.0290) Scattering : Scattering
(050.1755) Diffraction and gratings : Computational electromagnetic methods

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 29, 2009
Revised Manuscript: February 1, 2010
Manuscript Accepted: February 2, 2010
Published: March 24, 2010

Citation
Babak Alavikia and Omar M. Ramahi, "Electromagnetic scattering from multiple sub-wavelength apertures in metallic screens using the surface integral equation method," J. Opt. Soc. Am. A 27, 815-826 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-4-815

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