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BiBPM modeling of slow wave structures

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Abstract

The improvement of an algorithm of the 2D bidirectional beam propagation method (BiBPM) is presented. Usually, BiBPM is applied in modeling the Bragg structures with the flat surfaces or the stair-case approximation is used in the case of curved reflective surfaces. The local normal approximation is introduced and a new 2D BiBPM algorithm is derived for TE and TM polarization of guided waves. The complex Padé approximants are used for approximation of square root operators in BiBPM method. The pole-zero shifting method of building the complex Padé approximants is developed for the correct description of the evanescent field simulated by BiBPM. The numerical examples of application of BiBPM in modeling slow wave Bragg structures fabricated by the nano-imprint method in the polymer layers are considered.

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  1. Institute of Physics, Savanoriu 231, 02300, Vilnius, Lithuania

    R. Petruskevicius

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  1. R. Petruskevicius
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Petruskevicius, R. BiBPM modeling of slow wave structures. Opt Quant Electron 39, 407–418 (2007). https://doi.org/10.1007/s11082-007-9093-5

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  • DOI: https://doi.org/10.1007/s11082-007-9093-5

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