Abstract
Wide-angle full-vector beam propagation methods (BPMs) for three-dimensional wave-guiding structures can be derived on the basis of rational approximants of a square root operator or its exponential (i.e., the one-way propagator). While the less accurate BPM based on the slowly varying envelope approximation can be efficiently solved by the alternating direction implicit (ADI) method, the wide-angle variants involve linear systems that are more difficult to handle. We present an efficient solver for these linear systems that is based on a Krylov subspace method with an ADI preconditioner. The resulting wide-angle full-vector BPM is used to simulate the propagation of wave fields in a Y branch and a taper.
© 2004 Optical Society of America
Full Article | PDF ArticleMore Like This
Charles Vassallo
J. Opt. Soc. Am. A 13(4) 761-770 (1996)
Yang Ji, Binfeng Yun, Guohua Hu, and Yiping Cui
Opt. Lett. 32(21) 3194-3196 (2007)
Khai Q. Le and Peter Bienstman
J. Opt. Soc. Am. B 26(2) 353-356 (2009)