Abstract
An efficient numerical algorithm is developed to model wave propagation in 3D-printed freeform waveguides, so-called photonic wire bonds (PWBs). The method utilizes transformation-optics (TO) in combination with curvilinear meshing to transform the original 3D-freeform PWB into a straight waveguide with anisotropic material properties. This waveguide is then modeled using an anisotropic full-vectorial beam propagation method (BPM). We demonstrate the viability of our TO-BPM algorithm and benchmark its performance against a finite-difference-time-domain (FDTD) method. Our approach shows a 600-fold reduction of the computation time in combination with a mean percentage error of 3.2% in power transmission simulation relative to the FDTD.
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Acknowledgements
This work was funded by the Deutsche Forschungsgemeinschaft via the DFG Collaborative Research Center (CRC) WavePhenomena (SFB 1173) and via the Excellence Cluster ‘3D Matter Made to Order’, by the European Research Council via the ERC Consolidator Grant TeraSHAPE (# 773248), and by the Karlsruhe School of Optics & Photonics (KSOP).
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Foroutan-Barenji, S., Krimmer, J., Freude, W., Koos, C. (2024). Efficient Modelling of 3D-Printed Freeform Waveguides by a Dedicated Beam-Propagation Method (BPM) Based on Transformation Optics. In: Witzens, J., Poon, J., Zimmermann, L., Freude, W. (eds) The 25th European Conference on Integrated Optics. ECIO 2024. Springer Proceedings in Physics, vol 402. Springer, Cham. https://doi.org/10.1007/978-3-031-63378-2_18
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DOI: https://doi.org/10.1007/978-3-031-63378-2_18
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