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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. 1 — Jan. 1, 2010
  • pp: 116–122

Fast diffraction computation schema for multilayer crossed gratings containing layers with 1D periodicity

Joerg Bischoff  »View Author Affiliations


JOSA A, Vol. 27, Issue 1, pp. 116-122 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000116


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Abstract

The diffraction computation of crossed gratings is very slow compared with that of line-space gratings of the same size when using a modal method such as rigorous coupled wave analysis (RCWA) or the Chandezon coordinate transformation method. It is well known that the main bottleneck in terms of computation speed is the solution of an eigenproblem for each RCWA slice or interface in the case of the C-method. Even if the crossed grating contains layers that are periodic only in one direction, usually the full 2D problem has to be solved for this layer in order to connect it to the full system solution. In this paper, a computation schema is presented that takes advantage of the 1D periodicity of layers inside a 2D multilayer grating. This results in a considerable acceleration of the formulation and solution of the eigenproblem for these layers. With this new computation schema the total time required for 1D layers in a 2D layer stack can be greatly reduced.

© 2009 Optical Society of America

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

ToC Category:
Diffraction and Gratings

History
Original Manuscript: September 21, 2009
Revised Manuscript: November 16, 2009
Manuscript Accepted: November 20, 2009
Published: December 23, 2009

Citation
Joerg Bischoff, "Fast diffraction computation schema for multilayer crossed gratings containing layers with 1D periodicity," J. Opt. Soc. Am. A 27, 116-122 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-1-116


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References

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