We adapt an efficient finite-difference procedure for determining complex propagation constants to the analysis of modes in planar waveguides. The method requires solving a single rather than multiple eigenvalue equations and does not require prior knowledge of either the nature of the solutions or the position of the modal eigenvalues in the complex plane.
© 2001 Optical Society of America
Raymond Z. L. Ye and David O. Yevick, "Noniterative calculation of complex propagation constants in planar waveguides," J. Opt. Soc. Am. A 18, 2819-2822 (2001)