Broadband Topological Slow Light through Brillouin Zone Winding
- 13 September 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (12), 123601
- https://doi.org/10.1103/physrevlett.127.123601
Abstract
Topological photonic insulators have attracted significant attention for their robust transport of light, impervious to scattering and disorder. This feature is ideally suited for slow light applications, which are typically limited by disorder-induced attenuation. However, no practical approach to broadband topologically protected slow light has been demonstrated yet. In this work, we achieve slow light in topologically unidirectional waveguides based on periodically loading an edge termination with suitably tailored resonances. The resulting edge state dispersion can wind around the Brillouin zone multiple times sustaining broadband, topologically robust slow light, opening exciting opportunities in various photonic scenarios.Funding Information
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Air Force Office of Scientific Research
- Simons Foundation
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