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Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices
We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formati...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7438334/ https://www.ncbi.nlm.nih.gov/pubmed/32864119 http://dx.doi.org/10.1038/s41377-020-00377-6 |
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author | Jamadi, Omar Rozas, Elena Salerno, Grazia Milićević, Marijana Ozawa, Tomoki Sagnes, Isabelle Lemaître, Aristide Le Gratiet, Luc Harouri, Abdelmounaim Carusotto, Iacopo Bloch, Jacqueline Amo, Alberto |
author_facet | Jamadi, Omar Rozas, Elena Salerno, Grazia Milićević, Marijana Ozawa, Tomoki Sagnes, Isabelle Lemaître, Aristide Le Gratiet, Luc Harouri, Abdelmounaim Carusotto, Iacopo Bloch, Jacqueline Amo, Alberto |
author_sort | Jamadi, Omar |
collection | PubMed |
description | We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formation of Landau levels at the Dirac points. We provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction, a distinctive feature of synthetic magnetic fields. Our realization implements helical edge states in the gap between n = 0 and n = ±1 Landau levels, experimentally demonstrating a novel way of engineering propagating edge states in photonic lattices. In light of recent advances in the enhancement of polariton–polariton nonlinearities, the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system. |
format | Online Article Text |
id | pubmed-7438334 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-74383342020-08-27 Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices Jamadi, Omar Rozas, Elena Salerno, Grazia Milićević, Marijana Ozawa, Tomoki Sagnes, Isabelle Lemaître, Aristide Le Gratiet, Luc Harouri, Abdelmounaim Carusotto, Iacopo Bloch, Jacqueline Amo, Alberto Light Sci Appl Article We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formation of Landau levels at the Dirac points. We provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction, a distinctive feature of synthetic magnetic fields. Our realization implements helical edge states in the gap between n = 0 and n = ±1 Landau levels, experimentally demonstrating a novel way of engineering propagating edge states in photonic lattices. In light of recent advances in the enhancement of polariton–polariton nonlinearities, the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system. Nature Publishing Group UK 2020-08-19 /pmc/articles/PMC7438334/ /pubmed/32864119 http://dx.doi.org/10.1038/s41377-020-00377-6 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Jamadi, Omar Rozas, Elena Salerno, Grazia Milićević, Marijana Ozawa, Tomoki Sagnes, Isabelle Lemaître, Aristide Le Gratiet, Luc Harouri, Abdelmounaim Carusotto, Iacopo Bloch, Jacqueline Amo, Alberto Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title | Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title_full | Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title_fullStr | Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title_full_unstemmed | Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title_short | Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices |
title_sort | direct observation of photonic landau levels and helical edge states in strained honeycomb lattices |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7438334/ https://www.ncbi.nlm.nih.gov/pubmed/32864119 http://dx.doi.org/10.1038/s41377-020-00377-6 |
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