An analysis of the electromagnetic wave diffraction from a dielectric coated Fourier grating by using T-matrix method

Abstract

This paper describes exactly a new formulation of the T-matrix method with R-matrix expression for the electromagnetic diffraction efficiency about a case that the dielectric-coated metallic Fourier grating is illuminated by a plane wave. We show that the parameters of numerical calculations are widely applied by using R-matrix expression for the thick dielectric coating although this formulation is restricted for groove depth of the grating in a conventional T-matrix method.

Keywords:

• Dielectric coating
• ϵm wave diffraction
• Fourier grating
• T-matrix
• R-matrix

Acknowledgements

The author acknowledges helpful comments from Mr. M. Tsushima of the Pioneer Corp., and wishes to thank Prof. M. Matsumoto of the Waseda University for suggesting the present investigation.