A Propagator-θ Beam Propagation Method

  title={A Propagator-θ Beam Propagation Method},
  author={Siu Lit Chui and Ya Yan Lu},
A new wide-angle beam propagation method is developed for better modeling of both propagating and evanescent modes. It brings in a parameterθ to connect the[(p − 1)/p] and [p/p] Padé approximants of the one-way propagator. The parameter can be used to adjust the requirements of approximating the propagating modes and suppressing the evanescent modes. Numerical results indicate that a suitable choice ofθ leads to improved accuracy of the solution. 
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