Artifact-free analysis of highly conducting binary gratings by using the Legendre polynomial expansion method
JOSA A, Vol. 26, Issue 6, pp. 1467-1471 (2009)
http://dx.doi.org/10.1364/JOSAA.26.001467
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Abstract
Analysis of highly conducting binary gratings in TM polarization has been problematic as the Fourier factorization fails and thus unwanted numerical artifacts appear. The Legendre polynomial expansion method (LPEM) is employed here, and the erroneous harsh variations attributed to the violation of the inverse rule validity in applying the Fourier factorization are filtered out. In this fashion, stable and artifact-free numerical results are obtained. The observed phenomenon is clearly demonstrated via several numerical examples and is explained by inspecting the transverse electromagnetic field profile.
© 2009 Optical Society of America
OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(050.2770) Diffraction and gratings : Gratings
ToC Category:
Diffraction and Gratings
History
Original Manuscript: February 17, 2009
Revised Manuscript: April 27, 2009
Manuscript Accepted: April 28, 2009
Published: May 28, 2009
Citation
Amin Khavasi and Khashayar Mehrany, "Artifact-free analysis of highly conducting binary gratings by using the Legendre polynomial expansion method," J. Opt. Soc. Am. A 26, 1467-1471 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-6-1467
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