Assessment of Rational Approximations for Square Root Operator in Bidirectional Beam Propagation Method

@article{Zhang2008AssessmentOR,
  title={Assessment of Rational Approximations for Square Root Operator in Bidirectional Beam Propagation Method},
  author={Hua Zhang and Jianwei Mu and Wei-ping Huang},
  journal={Journal of Lightwave Technology},
  year={2008},
  volume={26},
  pages={600-607}
}
Accurate rational approximations to the square root operators are crucial for the bidirectional beam propagation method in simulation of strongly reflective structures. An assessment and comparison of various commonly used rational approximations is performed for both transverse electric (TE) and transverse magnetic (TM) waves. The range of validity and level of accuracy for the different approximations are studied by investigating the structures with varying reflection intensities. Guidelines… CONTINUE READING

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