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dc.contributor.authorHe, Yu-Ming
dc.contributor.authorIff, Oliver
dc.contributor.authorBaumann, Vasilij
dc.contributor.authorDavanco, Marcelo
dc.contributor.authorSrinivasan, Kartik
dc.contributor.authorHöfling, Sven
dc.contributor.authorSchneider, Christian
dc.date.accessioned2016-11-10T13:30:09Z
dc.date.available2016-11-10T13:30:09Z
dc.date.issued2016-11-10
dc.identifier.citationHe , Y-M , Iff , O , Baumann , V , Davanco , M , Srinivasan , K , Höfling , S & Schneider , C 2016 , ' Cascaded emission of single photons from the biexciton in monolayered WSe 2 ' , Nature Communications , vol. 7 , 13409 . https://doi.org/10.1038/ncomms13409en
dc.identifier.issn2041-1723
dc.identifier.otherPURE: 245468354
dc.identifier.otherPURE UUID: 0dc61a0b-3a1d-4573-9c4b-cfbe9baebe4f
dc.identifier.otherScopus: 84994888224
dc.identifier.otherWOS: 000387349400001
dc.identifier.urihttps://hdl.handle.net/10023/9797
dc.descriptionThis work has been supported by the State of Bavaria and the European Research Council (Project UnLiMIt-2D).en
dc.description.abstractMonolayers of transition metal dichalcogenide materials emerged as a new material class to study excitonic effects in solid state, as they benefit from enormous Coulomb correlations between electrons and holes. Especially in WSe2, sharp emission features have been observed at cryogenic temperatures, which act as single photon sources. Tight exciton localization has been assumed to induce an anharmonic excitation spectrum; however, the evidence of the hypothesis, namely the demonstration of a localized biexciton, is elusive. Here we unambiguously demonstrate the existence of a localized biexciton in a monolayer of WSe2, which triggers an emission cascade of single photons. The biexciton is identified by its time-resolved photoluminescence, superlinearity and distinct polarization in micro-photoluminescence experiments. We evidence the cascaded nature of the emission process in a cross-correlation experiment, which yields a strong bunching behaviour. Our work paves the way to a new generation of quantum optics experiments with two-dimensional semiconductors.
dc.format.extent6
dc.language.isoeng
dc.relation.ispartofNature Communicationsen
dc.rightsCopyright the Authors 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTen
dc.titleCascaded emission of single photons from the biexciton in monolayered WSe2en
dc.typeJournal articleen
dc.description.versionPostprinten
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1038/ncomms13409
dc.description.statusPeer revieweden


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