M. Ohki et al., ANALYSIS OF ELECTROMAGNETIC-WAVE DIFFRACTION FROM A METALLIC FOURIER GRATING BY USING THE T-MATRIX METHOD, Journal of electromagnetic waves and applications, 11(9), 1997, pp. 1257-1272
This paper describes the electromagnetic wave diffraction from a metal
lic Fourier grating based on the T-matrix analysis and the extended bo
undary condition. The grating consists of a basic sinusoidal wave and
a second-harmonic wave. The analytical form of the expression of matri
x elements is presented in the term of the Bessel functions. The error
of power conservation versus the truncated number of the basic functi
ons has been examined; thus a high accuracy result is obtained. Diffra
ction efficiencies versus incident angle, groove depth and wavelength
have also been discussed for both perfect and lossy metallic (Au) grat
ings. Numerical results are in good agreement with those obtained from
other methods and experimental values. Reasonable numerical results a
re presented for a groove depth per period of the grating less than 0.
28.