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Real higher-order Weyl photonic crystal

Higher-order Weyl semimetals are a family of recently predicted topological phases simultaneously showcasing unconventional properties derived from Weyl points, such as chiral anomaly, and multidimensional topological phenomena originating from higher-order topology. The higher-order Weyl semimetal...

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Autores principales: Pan, Yuang, Cui, Chaoxi, Chen, Qiaolu, Chen, Fujia, Zhang, Li, Ren, Yudong, Han, Ning, Li, Wenhao, Li, Xinrui, Yu, Zhi-Ming, Chen, Hongsheng, Yang, Yihao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10587095/
https://www.ncbi.nlm.nih.gov/pubmed/37857622
http://dx.doi.org/10.1038/s41467-023-42457-2
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author Pan, Yuang
Cui, Chaoxi
Chen, Qiaolu
Chen, Fujia
Zhang, Li
Ren, Yudong
Han, Ning
Li, Wenhao
Li, Xinrui
Yu, Zhi-Ming
Chen, Hongsheng
Yang, Yihao
author_facet Pan, Yuang
Cui, Chaoxi
Chen, Qiaolu
Chen, Fujia
Zhang, Li
Ren, Yudong
Han, Ning
Li, Wenhao
Li, Xinrui
Yu, Zhi-Ming
Chen, Hongsheng
Yang, Yihao
author_sort Pan, Yuang
collection PubMed
description Higher-order Weyl semimetals are a family of recently predicted topological phases simultaneously showcasing unconventional properties derived from Weyl points, such as chiral anomaly, and multidimensional topological phenomena originating from higher-order topology. The higher-order Weyl semimetal phases, with their higher-order topology arising from quantized dipole or quadrupole bulk polarizations, have been demonstrated in phononics and circuits. Here, we experimentally discover a class of higher-order Weyl semimetal phase in a three-dimensional photonic crystal (PhC), exhibiting the concurrence of the surface and hinge Fermi arcs from the nonzero Chern number and the nontrivial generalized real Chern number, respectively, coined a real higher-order Weyl PhC. Notably, the projected two-dimensional subsystem with k(z) = 0 is a real Chern insulator, belonging to the Stiefel-Whitney class with real Bloch wavefunctions, which is distinguished fundamentally from the Chern class with complex Bloch wavefunctions. Our work offers an ideal photonic platform for exploring potential applications and material properties associated with the higher-order Weyl points and the Stiefel-Whitney class of topological phases.
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spelling pubmed-105870952023-10-21 Real higher-order Weyl photonic crystal Pan, Yuang Cui, Chaoxi Chen, Qiaolu Chen, Fujia Zhang, Li Ren, Yudong Han, Ning Li, Wenhao Li, Xinrui Yu, Zhi-Ming Chen, Hongsheng Yang, Yihao Nat Commun Article Higher-order Weyl semimetals are a family of recently predicted topological phases simultaneously showcasing unconventional properties derived from Weyl points, such as chiral anomaly, and multidimensional topological phenomena originating from higher-order topology. The higher-order Weyl semimetal phases, with their higher-order topology arising from quantized dipole or quadrupole bulk polarizations, have been demonstrated in phononics and circuits. Here, we experimentally discover a class of higher-order Weyl semimetal phase in a three-dimensional photonic crystal (PhC), exhibiting the concurrence of the surface and hinge Fermi arcs from the nonzero Chern number and the nontrivial generalized real Chern number, respectively, coined a real higher-order Weyl PhC. Notably, the projected two-dimensional subsystem with k(z) = 0 is a real Chern insulator, belonging to the Stiefel-Whitney class with real Bloch wavefunctions, which is distinguished fundamentally from the Chern class with complex Bloch wavefunctions. Our work offers an ideal photonic platform for exploring potential applications and material properties associated with the higher-order Weyl points and the Stiefel-Whitney class of topological phases. Nature Publishing Group UK 2023-10-20 /pmc/articles/PMC10587095/ /pubmed/37857622 http://dx.doi.org/10.1038/s41467-023-42457-2 Text en © The Author(s) 2023 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Pan, Yuang
Cui, Chaoxi
Chen, Qiaolu
Chen, Fujia
Zhang, Li
Ren, Yudong
Han, Ning
Li, Wenhao
Li, Xinrui
Yu, Zhi-Ming
Chen, Hongsheng
Yang, Yihao
Real higher-order Weyl photonic crystal
title Real higher-order Weyl photonic crystal
title_full Real higher-order Weyl photonic crystal
title_fullStr Real higher-order Weyl photonic crystal
title_full_unstemmed Real higher-order Weyl photonic crystal
title_short Real higher-order Weyl photonic crystal
title_sort real higher-order weyl photonic crystal
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10587095/
https://www.ncbi.nlm.nih.gov/pubmed/37857622
http://dx.doi.org/10.1038/s41467-023-42457-2
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