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Study of the numerical artifacts in differential analysis of highly conducting gratings

Khavasi, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1364/OL.33.000159
  3. Publisher: 2008
  4. Abstract:
  5. Li's Fourier factorization rule [J. Opt. Soc. Am. A 13, 1870 (1996)] was recently shown to be problematic to apply to highly conducting metallic gratings. We provide further information about the applicability of different differential methods and are concerned with the relation of observed numerical artifacts, the total number of retained space harmonics, the presence of both positive and negative permittivity inside the groove region, and the validity of Li's inverse rule. Two different cases corresponding to lossless and low-loss binary metallic gratings are considered, and it is shown that an increase in the number of retained space harmonics can relieve the presence of numerical artifacts. © 2008 Optical Society of America
  6. Keywords:
  7. Differential analysis ; Inverse rule ; Metallic gratings ; Space harmonics ; Fourier analysis ; Harmonic analysis ; Inverse problems ; Diffraction gratings
  8. Source: Optics Letters ; Volume 33, Issue 2 , 2008 , Pages 159-161 ; 01469592 (ISSN)
  9. URL: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-33-2-159