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Journal of Computational Electronics

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28-02-2020

Structural optimization and parametric analysis of SOI optical slot waveguides

Author: Ritu Raj Singh

Published in: Journal of Computational Electronics | Issue 2/2020

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Abstract

Slot waveguides based on silicon-on-insulator dielectric material are investigated theoretically for structural optimization with the aim of attaining the maximum light confinement with the minimum mode footprint inside the slot region. The effects of various geometrical parameters on the field confinement factor and effective mode area are examined to determine the performance of dielectric vertical- and horizontal-slot waveguides. Parametric analysis for the optimization of the slot waveguides is carried out using the finite element method (FEM). The theoretical and FEM-based electric/magnetic field components and Poynting vector profiles are compared for both types of slot waveguide. Furthermore, a cross-slot structure is proposed based on the optimized parameters found for the vertical- and horizontal-slot waveguides, to guide both quasi-transverse electric (TE) and quasi-transverse magnetic (TM) modes simultaneously. For the cross-slot waveguide with optimized dimensions, the numerical simulation predicts a confinement factor of ~ 34.16% with an effective mode area of ~ 0.438 μm² in the quasi-TE mode and ~ 30.12% with 0.480 μm² in the quasi-TM mode.

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Title: Structural optimization and parametric analysis of SOI optical slot waveguides
Author: Ritu Raj Singh
Publication date: 28-02-2020
Publisher: Springer US
Published in: Journal of Computational Electronics / Issue 2/2020
Print ISSN: 1569-8025
Electronic ISSN: 1572-8137
DOI: https://doi.org/10.1007/s10825-020-01473-x

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