Convergence of Rayleigh-Fourier Method and Rigorous Differential Method for Relief Diffraction Gratings
- 1 May 1986
- journal article
- research article
- Published by Taylor & Francis in Optica Acta: International Journal of Optics
- Vol. 33 (5) , 593-605
- https://doi.org/10.1080/713821986
Abstract
The Rayleigh-Fourier method and the method of Chandezon et al. for the calculation of diffraction efficiency of sinusoidal metal, dielectric and coated dielectric gratings are compared with respect to the threshold truncation value and the thickness of the coating layer. For shallow gratings the convergence of the two methods is practically one and the same. However, for deeper gratings the method of Chandezon et al. is more powerful. It is shown that for coated dielectric gratings the thickness of the layer imposes a limit on the truncation value, the limitations being weaker for the method of Chandezon et al.Keywords
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