Programmable integrated photonics for topological Hamiltonians

Mehmet Berkay On, Farshid Ashtiani, David Sanchez-Jacome, Daniel Perez-Lopez, S. J. Ben Yoo and Andrea Blanco-Redondo ()
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Mehmet Berkay On: Nokia Bell Labs
Farshid Ashtiani: Nokia Bell Labs
David Sanchez-Jacome: iPronics Programmable Photonics
Daniel Perez-Lopez: iPronics Programmable Photonics
S. J. Ben Yoo: University of California Davis, Department of Electrical and Computer Engineering
Andrea Blanco-Redondo: Nokia Bell Labs

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract A variety of topological Hamiltonians have been demonstrated in photonic platforms, leading to fundamental discoveries and enhanced robustness in applications such as lasing, sensing, and quantum technologies. To date, each topological photonic platform implements a specific type of Hamiltonian with inexistent or limited reconfigurability. Here, we propose and demonstrate different topological models by using the same reprogrammable integrated photonics platform, consisting of a hexagonal mesh of silicon Mach-Zehnder interferometers with phase shifters. We specifically demonstrate a one-dimensional Su-Schrieffer-Heeger Hamiltonian supporting a localized topological edge mode and a higher-order topological insulator based on a two-dimensional breathing Kagome Hamiltonian with three corner states. These results highlight a nearly universal platform for topological models that may fast-track research progress toward applications of topological photonics and other coupled systems.

Date: 2024
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DOI: 10.1038/s41467-024-44939-3

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