Optical waveguide couplers enabled by adiabatic topological processes: optimized adiabatic passage based on odd-sized Su-Schrieffer-Heeger model

Yu Sung Choi; Jae Woong Yoon

doi:10.1117/12.2676636

5 October 2023 Optical waveguide couplers enabled by adiabatic topological processes: optimized adiabatic passage based on odd-sized Su-Schrieffer-Heeger model

Yu Sung Choi, Jae Woong Yoon

Author Affiliations +

Proceedings Volume PC12653, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XX; PC1265309 (2023) https://doi.org/10.1117/12.2676636
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

A basic model of topological insulators, the Su-Schrieffer-Heeger (SSH) model, has been applied in various photonic systems for novel optical effects and related applications. Here, we show that odd-numbered SSH chains may enable extremely broadband waveguide couplers. A special feature of odd-numbered SSH chain is that there is always a zero-energy localized state regardless of its bulk topological invariant value. We utilize this unique feature in adiabatic photonic waveguide systems for spectrally robust optical power dividers or combiners as opposed to the conventional interferometric components such as directional couplers and multimode interference couplers. We demonstrate broadband edge-to-edge and 1N couplers with their power balance persisting over the entire optical telecommunications bands. We provide detailed theory, experimental results, and remaining challenges.

Conference Presentation

Citation Download Citation

Yu Sung Choi and Jae Woong Yoon "Optical waveguide couplers enabled by adiabatic topological processes: optimized adiabatic passage based on odd-sized Su-Schrieffer-Heeger model", Proc. SPIE PC12653, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XX, PC1265309 (5 October 2023); https://doi.org/10.1117/12.2676636

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KEYWORDS

Waveguides

Systems modeling

Design and modelling

Energy transfer

Telecommunications

Optical filters

Photonics systems

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