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Efficient modeling method for emitting focusing grating coupler based on complex mode matching and effective index

Hui Xu, Chonglei Sun, Jia Zhao

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |February 24, 2022
    PubMed
    Summary

    An efficient compact model for photonics-focusing grating couplers was developed. This method simplifies 3D structures to 2D, reducing computation time and resources for integrated photonics simulations.

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    Area of Science:

    • Photonics
    • Integrated Optics
    • Computational Electromagnetics

    Background:

    • Focusing grating couplers are essential components in integrated photonic circuits.
    • Efficient modeling is crucial for device design and simulation.
    • Existing methods may require significant computational resources.

    Purpose of the Study:

    • To propose and study an efficient modeling method for photonics-focusing grating couplers.
    • To develop a compact model that reduces computational complexity.
    • To enable integration of the model into circuit simulations.

    Main Methods:

    • Utilized cylindrical slab modes and a 2D complex mode-matching method.
    • Employed the effective index method to reduce the 3D structure to 2D.
    • Validated the model using the finite-difference time-domain (FDTD) method.

    Main Results:

    • Developed an efficient and compact model for focusing grating couplers.
    • Significantly reduced computation time and required computational resources.
    • Demonstrated the accuracy of the compact model through FDTD simulations.

    Conclusions:

    • The proposed compact model offers an efficient approach for analyzing focusing grating couplers.
    • The model's accuracy and reduced resource requirements make it suitable for circuit simulations.
    • This advancement facilitates the design and integration of complex photonic devices.