Quantized Hall drift in a frequency-encoded photonic Chern insulator

The prospect of developing more efficient classical or quantum photonic devices through the suppression of backscattering is a major driving force for the field of topological photonics. However, genuine protection against backscattering in photonics requires implementing architectures with broken t...

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Bibliographic Details
Published in:arXiv.org 2024-12
Main Authors: Chénier, Alexandre, Bosco d'Aligny, Pellerin, Félix, Blanchard, Paul-Édouard, Ozawa, Tomoki, Carusotto, Iacopo, St-Jean, Philippe
Format: Article
Language:English
Subjects:
Backscattering
Brillouin zones
Coding
Optical fibers
Photonics
Topology
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Summary:The prospect of developing more efficient classical or quantum photonic devices through the suppression of backscattering is a major driving force for the field of topological photonics. However, genuine protection against backscattering in photonics requires implementing architectures with broken time-reversal which is technically challenging. Here, we make use of a frequency-encoded synthetic dimension scheme in an optical fibre loop platform to experimentally realise a photonic Chern insulator inspired from the Haldane model where time-reversal is explicitly broken through temporal modulation. The bands' topology is assessed by reconstructing the Bloch states' geometry across the Brillouin zone. We further highlight its consequences by measuring a driven-dissipative analogue of the quantized transverse Hall conductivity. Our results thus open the door to harnessing topologically protected unidirectional transport of light in frequency-multiplexed photonic systems.
ISSN:2331-8422