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06-12-2023

Wide bandwidth slow light waveguide in a manipulated 2D photonic crystal

Authors: S. Bahareh Seyedein Ardebili, Behnam Zeinalvand Farzin, Jong Su Kim

Published in: Journal of Computational Electronics | Issue 1/2024

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Abstract

The bandwidth limitation of slow light may distort optical pulses, potentially affecting their practical application. Therefore, researching structures capable of overcoming this limitation could represent a valuable step forward. This theoretical work explores a 2D photonic crystal waveguide with high bandwidth. The optimized structure, comprised of Ge cylinders in an air background, is designed to be arranged in square lattices containing a line defect. The line defect consists of a series of half-cylinders, with their centers aligned with neighboring cylinders at half the lattice constant. This defect generates a waveguide mode that propagates along the line. Additionally, the group index and bandwidth of the mode were studied and optimized for different radii of the photonic crystal. With this relatively simple structure and the selection of appropriate geometric sizes, high bandwidth and a group-index-bandwidth-product of up to one could be achieved.

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Metadata
Title
Wide bandwidth slow light waveguide in a manipulated 2D photonic crystal
Authors
S. Bahareh Seyedein Ardebili
Behnam Zeinalvand Farzin
Jong Su Kim
Publication date
06-12-2023
Publisher
Springer US
Published in
Journal of Computational Electronics / Issue 1/2024
Print ISSN: 1569-8025
Electronic ISSN: 1572-8137
DOI
https://doi.org/10.1007/s10825-023-02118-5