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The dark exciton ground state promotes photon-pair emission in individual perovskite nanocrystals

hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorTAMARAT, Philippe
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorHOU, Lei
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorTREBBIA, Jean-Baptiste
hal.structure.identifierSwiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
hal.structure.identifierDepartment of Chemistry and Applied Biosciences [ETH Zürich] [D-CHAB]
dc.contributor.authorSWARNKAR, Abhishek
hal.structure.identifierInstitut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
hal.structure.identifierPhysique - IEMN [PHYSIQUE - IEMN]
dc.contributor.authorBIADALA, Louis
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorLOUYER, Yann
hal.structure.identifierSwiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
dc.contributor.authorBODNARCHUK, Maryna
hal.structure.identifierSwiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
hal.structure.identifierDepartment of Chemistry and Applied Biosciences [ETH Zürich] [D-CHAB]
dc.contributor.authorKOVALENKO, Maksym
hal.structure.identifierInstitut des Fonctions Optiques pour les Technologies de l'informatiON [FOTON]
dc.contributor.authorEVEN, Jacky
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorLOUNIS, Brahim
dc.date.issued2020-11-26
dc.identifier.issn2041-1723
dc.description.abstractEnCesium lead halide perovskites exhibit outstanding optical and electronic properties for a wide range of applications in optoelectronics and for light-emitting devices. Yet, the physics of the band-edge exciton, whose recombination is at the origin of the photoluminescence, is not elucidated. Here, we unveil the exciton fine structure of individual cesium lead iodide perovskite nanocrystals and demonstrate that it is governed by the electron-hole exchange interaction and nanocrystal shape anisotropy. The lowest-energy exciton state is a long-lived dark singlet state, which promotes the creation of biexcitons at low temperatures and thus correlated photon pairs. These bright quantum emitters in the near-infrared have a photon statistics that can readily be tuned from bunching to antibunching, using magnetic or thermal coupling between dark and bright exciton sublevels.
dc.description.sponsorshipUniversity of Bordeaux Graduate Scholl in Light Sciences & Technologies - ANR-17-EURE-0027
dc.language.isoen
dc.publisherNature Publishing Group
dc.title.enThe dark exciton ground state promotes photon-pair emission in individual perovskite nanocrystals
dc.typeArticle de revue
dc.identifier.doi10.1038/s41467-020-19740-7
dc.subject.halPhysique [physics]
dc.subject.halPhysique [physics]/Physique Quantique [quant-ph]
bordeaux.journalNature Communications
bordeaux.page6001
bordeaux.volume11
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-03015064
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03015064v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nature%20Communications&rft.date=2020-11-26&rft.volume=11&rft.issue=1&rft.spage=6001&rft.epage=6001&rft.eissn=2041-1723&rft.issn=2041-1723&rft.au=TAMARAT,%20Philippe&HOU,%20Lei&TREBBIA,%20Jean-Baptiste&SWARNKAR,%20Abhishek&BIADALA,%20Louis&rft.genre=article


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