Optimized 3D simulation method for modeling of out-of-plane radiation in silicon photonic integrated circuits

Journal article (2011)
Department
ImPhys/Imaging Physics (AS) (TU Delft)
Copyright: © 2011 IEEE
Integrated optics Simulations Gratings Electromagnetic scattering by periodic structures FDTD methods Silicon on insulator technology Optical planar waveguide couplers
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Published Date

24-03-2011

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Source:

IEEE Journal of Quantum Electronics, 47 (5), 2011; Authors version

ISSN:

0018-9197

Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Abstract

We present an accurate and fast 3D simulation scheme for out-of-plane grating couplers, based on two dimensional rigorous (finite difference time domain) grating simulations, the effective index method (EIM), and the Rayleigh-Sommerfeld diffraction formula. In comparison with full 3D FDTD simulations, the rms difference in electric field is below 5% and the difference in power flux is below 3%. A grating coupler for coupling from a silicon-on-insulator photonic integrated circuit to an optical fiber positioned 0.1 mm above the circuit is designed as example.