G. Tayeb, DISPERSION IN PHOTONIC MEDIA AND DIFFRACTION FROM GRATINGS - A DIFFERENT MODAL EXPANSION FOR THE R-MATRIX PROPAGATION TECHNIQUE - COMMENT, Journal of the Optical Society of America. A, Optics, image science,and vision., 13(8), 1996, pp. 1766-1767
In a recent paper by Elson and Tran [J. Opt. Sec. Am. A 12, 1765 (1995
)], numerical results are given and compared with those obtained by Li
[J. Opt. Sec. Am. A 10, 2581 (1993)]. Some strong discrepancies appea
r in these comparisons, especially in TM polarization. Accurate and re
liable data are given to clarify this disagreement. (C) 1996 Optical S
ociety of America.