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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 20, Iss. 12 — Dec. 1, 2003
  • pp: 2274–2280

Electromagnetic beam diffraction by a finite lamellar structure: an aperiodic coupled-wave method

Brahim Guizal, Dominique Barchiesi, and Didier Felbacq  »View Author Affiliations

JOSA A, Vol. 20, Issue 12, pp. 2274-2280 (2003)

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We have developed a new formulation of the coupled-wave method (CWM) to handle aperiodic lamellar structures, and it will be referred to as the aperiodic coupled-wave method (ACWM). The space is still divided into three regions, but the fields are written by use of their Fourier integrals instead of the Fourier series. In the modulated region the relative permittivity is represented by its Fourier transform, and then a set of integrodifferential equations is derived. Discretizing the last system leads to a set of ordinary differential equations that is reduced to an eigenvalue problem, as is usually done in the CWM. To assess the method, we compare our results with three independent formalisms: the Rayleigh perturbation method for small samples, the volume integral method, and the finite-element method.

© 2003 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics

Original Manuscript: February 14, 2003
Revised Manuscript: June 6, 2003
Manuscript Accepted: July 31, 2003
Published: December 1, 2003

Brahim Guizal, Dominique Barchiesi, and Didier Felbacq, "Electromagnetic beam diffraction by a finite lamellar structure: an aperiodic coupled-wave method," J. Opt. Soc. Am. A 20, 2274-2280 (2003)

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