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Article: Pseudospin-Polarized Topological Line Defects in Dielectric Photonic Crystals

TitlePseudospin-Polarized Topological Line Defects in Dielectric Photonic Crystals
Authors
KeywordsEdge states
Finite-difference (FD) supercell approach
Photonic crystals (PCs)
Topological line defect
Issue Date2020
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8
Citation
IEEE Transactions on Antennas and Propagation, 2020, v. 68 n. 1, p. 609-613 How to Cite?
AbstractElectromagnetic (EM) topological insulators have been extensively explored due to the robust edge states they support. In this work, we propose a topological EM system based on a line defect in topologically nontrivial photonic crystals (PCs). With a finite-difference supercell approach, modal analysis of the PC structure is investigated in detail. The topological line-defect states are pseudospin polarized and their energy flow directions are determined by the corresponding pseudospin helicities. These states can be excited by using two spatially symmetric line-source arrays carrying orbital angular momenta. The feature of the unidirectional propagation is demonstrated and it is stable when disorders are introduced to the PC structure.
Persistent Identifierhttp://hdl.handle.net/10722/279391
ISSN
2019 Impact Factor: 4.371
2015 SCImago Journal Rankings: 2.130

 

DC FieldValueLanguage
dc.contributor.authorChen, MLN-
dc.contributor.authorJiang, LJ-
dc.contributor.authorLan, Z-
dc.contributor.authorSha, W-
dc.date.accessioned2019-11-01T07:16:26Z-
dc.date.available2019-11-01T07:16:26Z-
dc.date.issued2020-
dc.identifier.citationIEEE Transactions on Antennas and Propagation, 2020, v. 68 n. 1, p. 609-613-
dc.identifier.issn0018-926X-
dc.identifier.urihttp://hdl.handle.net/10722/279391-
dc.description.abstractElectromagnetic (EM) topological insulators have been extensively explored due to the robust edge states they support. In this work, we propose a topological EM system based on a line defect in topologically nontrivial photonic crystals (PCs). With a finite-difference supercell approach, modal analysis of the PC structure is investigated in detail. The topological line-defect states are pseudospin polarized and their energy flow directions are determined by the corresponding pseudospin helicities. These states can be excited by using two spatially symmetric line-source arrays carrying orbital angular momenta. The feature of the unidirectional propagation is demonstrated and it is stable when disorders are introduced to the PC structure.-
dc.languageeng-
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8-
dc.relation.ispartofIEEE Transactions on Antennas and Propagation-
dc.subjectEdge states-
dc.subjectFinite-difference (FD) supercell approach-
dc.subjectPhotonic crystals (PCs)-
dc.subjectTopological line defect-
dc.titlePseudospin-Polarized Topological Line Defects in Dielectric Photonic Crystals-
dc.typeArticle-
dc.identifier.emailChen, MLN: menglin@connect.hku.hk-
dc.identifier.emailJiang, LJ: jianglj@hku.hk-
dc.identifier.emailSha, W: shawei@hku.hk-
dc.identifier.authorityJiang, LJ=rp01338-
dc.identifier.authoritySha, W=rp01605-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/TAP.2019.2934816-
dc.identifier.scopuseid_2-s2.0-85077956768-
dc.identifier.hkuros308527-
dc.identifier.volume68-
dc.identifier.issue1-
dc.identifier.spage609-
dc.identifier.epage613-
dc.publisher.placeUnited States-

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