M. Ohki et al., T-MATRIX ANALYSIS OF ELECTROMAGNETIC-WAVE DIFFRACTION FROM A FOURIER GRATING, International journal of infrared and millimeter waves, 18(10), 1997, pp. 2031-2045
This paper is described for T-matrix analysis of the electromagnetic w
ave diffraction from a Fourier grating that the boundary value problem
is treated by applying the extended boundary condition. The rigorous
form of the expression of matrix elements is presented in the term of
Bessel functions of the first kind. The error of power conservation ve
rsus the truncated number has been examined for mode number. Diffracti
on efficiencies versus groove depth and wavelength for a second or thi
rd harmonic wave of Fourier grating have been discussed. Numerical res
ults are in good agreement with those obtained from other method and e
xperimental values, Reasonable numerical results are presented for a g
roove depth per period of the Fourier grating less than 0.25.