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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: 878–889

All-purpose finite element formulation for arbitrarily shaped crossed-gratings embedded in a multilayered stack

Guillaume Demésy, Frédéric Zolla, André Nicolet, and Mireille Commandré  »View Author Affiliations


JOSA A, Vol. 27, Issue 4, pp. 878-889 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000878


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Abstract

We propose a novel formulation of the finite element method adapted to the calculation of the vector field diffracted by an arbitrarily shaped crossed-grating embedded in a multilayered stack and illuminated by an arbitrarily polarized plane wave under oblique incidence. A complete energy balance (transmitted and reflected diffraction efficiencies and losses) is deduced from field maps. The accuracy of the proposed formulation has been tested using classical cases computed with independent methods. Moreover, to illustrate the independence of our method with respect to the shape of the diffractive object, we present the global energy balance resulting from the diffraction of a plane wave by a lossy thin torus crossed-grating. Finally, computation time and convergence as a function of the mesh refinement are discussed. As far as integrated energy values are concerned, the presented method shows a remarkable convergence even for coarse meshes.

© 2010 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 6, 2009
Revised Manuscript: February 5, 2010
Manuscript Accepted: February 10, 2010
Published: March 29, 2010

Citation
Guillaume Demésy, Frédéric Zolla, André Nicolet, and Mireille Commandré, "All-purpose finite element formulation for arbitrarily shaped crossed-gratings embedded in a multilayered stack," J. Opt. Soc. Am. A 27, 878-889 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-4-878

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