P. Sewell et al., TRANSCENDENTAL EQUATION FOR THE VECTORIAL MODES OF BURIED OPTICAL WAVE-GUIDES, IEEE photonics technology letters, 9(1), 1997, pp. 70-72
The free-space radiation mode (FSRM) method is extended to allow full
vector modal analysis of buried optical waveguides to be computed semi
-analytically in a very fast, efficient, get accurate, manner. Both TE
and TM dominated modes are investigated, identifying propagation cons
tants via an explicit transcendental equation, and full field profiles
.