Show simple item record

dc.contributor.authorMittal, Sunil
dc.contributor.authorOrre, Venkata Vikram
dc.contributor.authorZhu, Guanyu
dc.contributor.authorGorlach, Maxim A
dc.contributor.authorPoddubny, Alexander
dc.contributor.authorHafezi, Mohammad
dc.date.accessioned2019-07-11T12:30:49Z
dc.date.available2019-07-11T12:30:49Z
dc.date.issued2019
dc.identifier.issn1749-4885
dc.identifier.doi10.1038/s41566-019-0452-0
dc.identifier.urihttp://hdl.handle.net/10072/386304
dc.description.abstractThe topological phases of matter are characterized using the Berry phase, a geometrical phase associated with the energy-momentum band structure. The quantization of the Berry phase and the associated wavefunction polarization manifest as remarkably robust physical observables, such as quantized Hall conductivity and disorder-insensitive photonic transport1,2,3,4,5. Recently, a novel class of topological phases, called higher-order topological phases, were proposed by generalizing the fundamental relationship between the Berry phase and quantized polarization, from dipole to multipole moments6,7,8. Here, we demonstrate photonic realization of the quantized quadrupole topological phase, using silicon photonics. In our two-dimensional second-order topological phase, we show that the quantization of the bulk quadrupole moment manifests as topologically robust zero-dimensional corner states. We contrast these topological states against topologically trivial corner states in a system without bulk quadrupole moment, where we observe no robustness. Our photonic platform could enable the development of robust on-chip classical and quantum optical devices with higher-order topological protection.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherNature Research
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto6
dc.relation.ispartofjournalNature Photonics
dc.subject.fieldofresearchMathematical sciences
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchcode49
dc.subject.fieldofresearchcode51
dc.titlePhotonic quadrupole topological phases
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.description.notepublicThis publication has been entered into Griffith Research Online as an Advanced Online Version.
gro.rights.copyright© 2019 Nature Publishing Group. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorHafezi, Mehdi


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record