Ct. Chou et Sk. Jeng, EM ANALYSIS OF A CONDUCTING SCATTERER IN OPTIC DIELECTRIC WAVE-GUIDE, Journal of lightwave technology, 16(6), 1998, pp. 1107-1112
A method to compute the scattered field of curved mirrors and gratings
in a dielectric slab waveguide is proposed, In contrast to the beam p
ropagation method (BPM) for this kind of problems, the method of momen
t is adopted. By introducing the dyadic Green's function in a slab wav
eguide, the electric field integral equations for induced current dist
ribution on the conducting obstacles are derived. To improve the compu
tational efficiency, the modified Green's function is incorporated int
o the computation program. With this study, the effects of grooves of
gratings and the finite extent of the mirrors in dielectric waveguides
can be investigated in more detail.