B. Chernov et al., Fast Fourier factorization method applied to modal analysis of slanted lamellar diffraction gratings in conical mountings, OPT COMMUN, 194(4-6), 2001, pp. 289-297
A new formulation of the Fourier modal method that applies fast Fourier fac
torization [J. Opt. Sec. Am. A 17 (2000) 1773] is presented for slanted lam
ellar gratings in conical mountings. A new eigenvalue problem in the gratin
g region is derived, and used to study metallic gratings. Comparison of the
convergence speed of the numerical results given by the conventional metho
ds and the new one shows a spectacular improvement. The fast Fourier factor
ization method can be also applied to various volume slanted-fringe grating
s with discontinuous permittivity variations. (C) 2001 Elsevier Science B.V
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