Robust reconfigurable electromagnetic pathways within a photonic topological insulator
Abstract
The discovery of topological photonic states has revolutionized our understanding of electromagnetic propagation and scattering. Endowed with topological robustness, photonic edge modes are not reflected from structural imperfections and disordered regions. Here we demonstrate robust propagation along reconfigurable pathways defined by synthetic gauge fields within a topological photonic metacrystal. The flow of microwave radiation in helical edge modes following arbitrary contours of the synthetic gauge field between bianisotropic metacrystal domains is unimpeded. This is demonstrated in measurements of the spectrum of transmission and time delay along the topological domain walls. These results provide a framework for freely steering electromagnetic radiation within photonic structures.
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Currently proposed PTIs and STIs usually require covers to confine the waves in the vertical direction to prevent radiative leakage into free space.
“However, currently proposed PTIs and STIs usually require covers to confine the waves in the vertical direction to prevent radiative leakage into free space20–25.”
From Direct observation of valley-polarized topological edge states in designer surface plasmon crystals (2017) · cites this paper as [25]
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- Authors
- Cheng, X., Jouvaud, C., Ni, X., Mousavi, S. H., Genack, A. Z., & Khanikaev, A. B.
- Affiliations
- Queens College, CUNY (US)
- The University of Texas at Austin (US)
- Corresponding author
- Genack, Azriel Z.
- Khanikaev, Alexander B.
- Venue
- Nature Materials
- Published
- 2016-02-22
- Volume
- 15
- Issue
- 5
- Pages
- 542-548
- ISSN
- 1476-1122 (ISSN-L)
- 1476-4660
- OpenAlex
- W2281672510
- Cited by
- 618
- References
- 7
- Citations by year
- 2026: 25 · 2025: 50 · 2024: 75 · 2023: 59 · 2022: 65 · 2021: 67 · 2020: 66 · 2019: 66 · 2018: 79 · 2017: 48 · 2016: 18
- FWCI
- 33.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Nature Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Division of Materials Research
- Division of Civil, Mechanical and Manufacturing Innovation
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Non-Hermitian Physics
- Keywords
- photonic topological insulators, synthetic gauge fields, helical edge states, microwave propagation, topological protection, magnetic domain walls, parallel-plate waveguide, time delay
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Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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