An integral equation analysis of two-dimensional dielectric gratings

Electromagnetic wave propagation in true-dimensional dielectric gratings, c onsisting of a periodic away of rectangular anisotropic dielectric waveguid es, is examined here using an integral equation including the application o f the moment method, the volume equivalence theorem, and an adequate electr ic field expansion inside each rectangular dielectric waveguide. Curves of normalized phase constant as functions of the normalized Floquet's wavenumb er are obtained for various waveguide dimensions. Agreement is observed wit h existing results in the limit of the one-dimensional dielectric grating ( C) 1999 John Wiley & Sons, Inc.