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Article: Valley photonic crystals for control of spin and topology

TitleValley photonic crystals for control of spin and topology
Authors
Issue Date2017
Citation
Nature Materials, 2017, v. 16, n. 3, p. 298-302 How to Cite?
Abstract© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Photonic crystals offer unprecedented opportunity for light manipulation and applications in optical communication and sensing. Exploration of topology in photonic crystals and metamaterials with non-zero gauge field has inspired a number of intriguing optical phenomena such as one-way transport and Weyl points. Recently, a new degree of freedom, valley, has been demonstrated in two-dimensional materials. Here, we propose a concept of valley photonic crystals with electromagnetic duality symmetry but broken inversion symmetry. We observe photonic valley Hall effect originating from valley-dependent spin-split bulk bands, even in topologically trivial photonic crystals. Valley-spin locking behaviour results in selective net spin flow inside bulk valley photonic crystals. We also show the independent control of valley and topology in a single system that has been long pursued in electronic systems, resulting in topologically-protected flat edge states. Valley photonic crystals not only offer a route towards the observation of non-trivial states, but also open the way for device applications in integrated photonics and information processing using spin-dependent transportation.
Persistent Identifierhttp://hdl.handle.net/10722/256802
ISSN
2020 Impact Factor: 43.841
2020 SCImago Journal Rankings: 14.344
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDong, Jian Wen-
dc.contributor.authorChen, Xiao Dong-
dc.contributor.authorZhu, Hanyu-
dc.contributor.authorWang, Yuan-
dc.contributor.authorZhang, Xiang-
dc.date.accessioned2018-07-24T08:57:58Z-
dc.date.available2018-07-24T08:57:58Z-
dc.date.issued2017-
dc.identifier.citationNature Materials, 2017, v. 16, n. 3, p. 298-302-
dc.identifier.issn1476-1122-
dc.identifier.urihttp://hdl.handle.net/10722/256802-
dc.description.abstract© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Photonic crystals offer unprecedented opportunity for light manipulation and applications in optical communication and sensing. Exploration of topology in photonic crystals and metamaterials with non-zero gauge field has inspired a number of intriguing optical phenomena such as one-way transport and Weyl points. Recently, a new degree of freedom, valley, has been demonstrated in two-dimensional materials. Here, we propose a concept of valley photonic crystals with electromagnetic duality symmetry but broken inversion symmetry. We observe photonic valley Hall effect originating from valley-dependent spin-split bulk bands, even in topologically trivial photonic crystals. Valley-spin locking behaviour results in selective net spin flow inside bulk valley photonic crystals. We also show the independent control of valley and topology in a single system that has been long pursued in electronic systems, resulting in topologically-protected flat edge states. Valley photonic crystals not only offer a route towards the observation of non-trivial states, but also open the way for device applications in integrated photonics and information processing using spin-dependent transportation.-
dc.languageeng-
dc.relation.ispartofNature Materials-
dc.titleValley photonic crystals for control of spin and topology-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1038/nmat4807-
dc.identifier.scopuseid_2-s2.0-84997719828-
dc.identifier.volume16-
dc.identifier.issue3-
dc.identifier.spage298-
dc.identifier.epage302-
dc.identifier.eissn1476-4660-
dc.identifier.isiWOS:000394601600010-
dc.identifier.issnl1476-1122-

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