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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 16 — Jun. 1, 2011
  • pp: 2474–2483

Effective schema for the rigorous modeling of grating diffraction with focused beams

Joerg Bischoff and Werner Neundorf  »View Author Affiliations

Applied Optics, Vol. 50, Issue 16, pp. 2474-2483 (2011)

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Most modal diffraction methods are formulated for incident plane waves. In practical applications, the probing beam is focused. Usually, this is simulated by means of numerical integration where Gaussian quadrature formulas are most effective. These formulas require smooth integrands, which is not fulfilled for gratings due to Rayleigh singularities and physical resonances. The violation of this condition entails inaccurate integration results, such as kinks and other artifacts. In this paper, a methodology for the efficient treatment of the numerical integration with improved accuracy is presented. It is based on the subdivision of the aperture along the lines of Rayleigh singularities, mapping of these subapertures into unit squares, and separate application of the Gaussian cubature formulas for each subarea.

© 2011 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory

ToC Category:
Diffraction and Gratings

Original Manuscript: November 18, 2010
Revised Manuscript: March 3, 2011
Manuscript Accepted: March 11, 2011
Published: May 27, 2011

Joerg Bischoff and Werner Neundorf, "Effective schema for the rigorous modeling of grating diffraction with focused beams," Appl. Opt. 50, 2474-2483 (2011)

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