title: Beam propagation method using a [(p- 1)/ p] Padé approximant of the propagator.
abstract: A new beam propagation method (BPM) is developed based on a direct approximation to the propagator by its [(p-1)/p] Padé approximant. The approximant is simple to construct and has the desired damping effect for the evanescent modes. The method is applied to a tapered waveguide for TM-polarized waves, based on the energy-conserving improvement of the one-way Helmholtz equation. Numerical results are compared with those obtained with other variants of the BPM.
authors.forename: Ya Yan
authors.initials: YY
authors.lastname: Lu
authors.forename: Pui Lin
authors.initials: PL
authors.lastname: Ho