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Article: Observation of Hourglass Nodal Lines in Photonics

TitleObservation of Hourglass Nodal Lines in Photonics
Authors
Issue Date2019
Citation
Physical Review Letters, 2019, v. 122, n. 10, article no. 103903 How to Cite?
Abstract© 2019 American Physical Society. Nodal line semimetals exhibiting line degeneracies in three-dimensional momentum space have been demonstrated recently. In general, the presence of nodal line semimetals is protected by special symmetries, such as mirror symmetry. However, these symmetries are usually necessary but not sufficient conditions, as nodal lines can be annihilated even without breaking them. Very recently, nodal line semimetal possessing an hourglass-shaped band structure emerges as a more robust candidate, where line degeneracies cannot be annihilated while preserving all underlying spatial symmetries. Here, for the first time, we experimentally demonstrate the presence of an hourglass nodal line (HNL) in photonic metacrystal at microwave frequency. We observe the HNL through near-field scanning of the spatial fields, followed by subsequent Fourier transformations. The observed photonic HNL resides in a clean and large frequency interval and is immune to symmetry preserving perturbation, which provides an ideal robust platform for photonic applications, such as anomalous quantum oscillation, spontaneous emission and resonant scattering.
Persistent Identifierhttp://hdl.handle.net/10722/295106
ISSN
2020 Impact Factor: 9.161
2015 SCImago Journal Rankings: 3.731
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorXia, Lingbo-
dc.contributor.authorGuo, Qinghua-
dc.contributor.authorYang, Biao-
dc.contributor.authorHan, Jiaguang-
dc.contributor.authorLiu, Chao Xing-
dc.contributor.authorZhang, Weili-
dc.contributor.authorZhang, Shuang-
dc.date.accessioned2021-01-05T04:59:05Z-
dc.date.available2021-01-05T04:59:05Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review Letters, 2019, v. 122, n. 10, article no. 103903-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/295106-
dc.description.abstract© 2019 American Physical Society. Nodal line semimetals exhibiting line degeneracies in three-dimensional momentum space have been demonstrated recently. In general, the presence of nodal line semimetals is protected by special symmetries, such as mirror symmetry. However, these symmetries are usually necessary but not sufficient conditions, as nodal lines can be annihilated even without breaking them. Very recently, nodal line semimetal possessing an hourglass-shaped band structure emerges as a more robust candidate, where line degeneracies cannot be annihilated while preserving all underlying spatial symmetries. Here, for the first time, we experimentally demonstrate the presence of an hourglass nodal line (HNL) in photonic metacrystal at microwave frequency. We observe the HNL through near-field scanning of the spatial fields, followed by subsequent Fourier transformations. The observed photonic HNL resides in a clean and large frequency interval and is immune to symmetry preserving perturbation, which provides an ideal robust platform for photonic applications, such as anomalous quantum oscillation, spontaneous emission and resonant scattering.-
dc.languageeng-
dc.relation.ispartofPhysical Review Letters-
dc.titleObservation of Hourglass Nodal Lines in Photonics-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevLett.122.103903-
dc.identifier.pmid30932638-
dc.identifier.scopuseid_2-s2.0-85062939798-
dc.identifier.volume122-
dc.identifier.issue10-
dc.identifier.spagearticle no. 103903-
dc.identifier.epagearticle no. 103903-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000461919200007-
dc.identifier.issnl0031-9007-

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