Gh. Jin et al., IMPROVED BIDIRECTIONAL BEAM-PROPAGATION METHOD FOR ANALYSIS OF REFLECTION ON NONPARALLEL INTERFACES, Electronics Letters, 31(21), 1995, pp. 1867-1869
An improved bidirectional beam propagation method (IBBPM) is proposed,
to allow the analysis of optical wave reflection and transmission in
waveguiding structures with multiple nonparallel interfaces.