Numerical optimization of topological photonic waveguides

• Main Author: Chan, Ric
• Other Authors: Chong Yidong
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Physics; Photonics
• Online Access: https://hdl.handle.net/10356/175476
• Institution: Nanyang Technological University

The integration of topological concepts from condensed matter physics into photonics has sparked a new era of innovation in the design of photonic waveguides. These topological photonic waveguides offer a unique solution for efficiently routing light around corners while minimizing backscattering losses. They have found applications across various platforms, including “on-chip" configurations, making them ideal for integrated optical systems. This thesis explores the ability of numerical optimization of topological photonic waveguides to optimize their coupling with other optical components, including non-topological waveguides. To achieve this, we employ MEEP, a versatile and open-source electromagnetics solver, and leverage advanced numerical optimization techniques, such as adjoint optimization. Our research delves into the intricate interplay between topological waveguides and their integration with conventional counterparts. We aim to uncover the optimal configurations, geometries, and parameters that yield the most efficient and effective coupling between these different waveguide types. By doing so, we seek to enhance the performance and functionality of integrated optical systems, ultimately paving the way for more advanced and versatile photonic devices. Through rigorous simulation, analysis, and optimization, this work contributes to the ever-expanding realm of photonic technology, offering a deeper understanding of topological waveguides and their seamless integration into practical optical applications. The results presented herein have the potential to significantly impact the development of future photonic devices and systems, driving the boundaries of what is achievable in the field of integrated optics.