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Topological Floquet edge states in periodically curved waveguides

Zhu, Bo; Zhong, Honghua; Ke, Yongguan; Qin, Xizhou; Sukhorukov, Andrey; Kivshar, Yuri; Lee, C.-H.

Description

We study the Floquet edge states in arrays of periodically curved optical waveguides described by the modulated Su-Schrieffer-Heeger model. Beyond the bulk-edge correspondence, our study explores the interplay between band topology and periodic modulations. By analyzing the quasienergy spectra and Zak phase, we reveal that, although topological and nontopological edge states can exist for the same parameters, they cannot appear in the same spectral gap. In the high-frequency limit, we find...[Show more]

dc.contributor.authorZhu, Bo
dc.contributor.authorZhong, Honghua
dc.contributor.authorKe, Yongguan
dc.contributor.authorQin, Xizhou
dc.contributor.authorSukhorukov, Andrey
dc.contributor.authorKivshar, Yuri
dc.contributor.authorLee, C.-H.
dc.date.accessioned2020-04-20T02:46:38Z
dc.identifier.issn2469-9926
dc.identifier.urihttp://hdl.handle.net/1885/203261
dc.description.abstractWe study the Floquet edge states in arrays of periodically curved optical waveguides described by the modulated Su-Schrieffer-Heeger model. Beyond the bulk-edge correspondence, our study explores the interplay between band topology and periodic modulations. By analyzing the quasienergy spectra and Zak phase, we reveal that, although topological and nontopological edge states can exist for the same parameters, they cannot appear in the same spectral gap. In the high-frequency limit, we find analytically all boundaries between the different phases and study the coexistence of topological and nontopological edge states. In contrast to unmodulated systems, the edge states appear due to either band topology or modulation-induced defects. This means that periodic modulations may not only tune the parametric regions with nontrivial topology, but may also support novel edge states.
dc.description.sponsorshipThe National Natural Science Foundation of China (NNSFC) under Grants No. 11574405 and No. 11465008, and by the Australian Research Council. Both B.Z. and H.Z. made equal contributions.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.rights©2018 American Physical Society
dc.sourcePhysical Review A
dc.titleTopological Floquet edge states in periodically curved waveguides
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume98
dc.date.issued2018
local.identifier.absfor020504 - Photonics, Optoelectronics and Optical Communications
local.identifier.ariespublicationu4485658xPUB240
local.publisher.urlwww.aps.org
local.type.statusPublished Version
local.contributor.affiliationZhu, Bo, Sun Yat-Sen University
local.contributor.affiliationZhong, Honghua, Sun Yat-sen University
local.contributor.affiliationKe, Yongguan, Sun Yat-Sen University
local.contributor.affiliationQin, Xizhou, Sun Yat-sen University
local.contributor.affiliationSukhorukov, Andrey, College of Science, ANU
local.contributor.affiliationKivshar, Yuri, College of Science, ANU
local.contributor.affiliationLee, C.-H., Sun Yat-sen University
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1103/PhysRevA.98.013855
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2019-11-25T07:54:04Z
local.identifier.scopusID2-s2.0-85051210321
dcterms.accessRightsOpen Access
dc.provenancehttp://sherpa.ac.uk/romeo/issn/2469-9926/..." author can archive publisher's version/PDF" from Sherpa/Romeo (as at 20/04/2020)
CollectionsANU Research Publications

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