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dc.contributor.authorDelteil, Aymeric
dc.contributor.authorFink, Thomas
dc.contributor.authorSchade, Anne
dc.contributor.authorHöfling, Sven
dc.contributor.authorSchneider, Christian
dc.contributor.authorImamoğlu, Ataç
dc.identifier.citationDelteil , A , Fink , T , Schade , A , Höfling , S , Schneider , C & Imamoğlu , A 2019 , ' Towards polariton blockade of confined exciton–polaritons ' , Nature Materials , vol. 18 , no. 3 , pp. 219-222 .
dc.identifier.otherPURE: 257289273
dc.identifier.otherPURE UUID: 3ab4236b-ece0-4772-b692-77c5fb409bc1
dc.identifier.otherScopus: 85061821555
dc.identifier.otherPubMed: 30783230
dc.identifier.otherWOS: 000459017900012
dc.descriptionThis work was supported by the Swiss National Science Foundation (SNSF) through a DACH project 200021E-158569-1, SNSF National Centre of Competence in Research – Quantum Science and Technology (NCCR QSIT) and an ERC Advanced investigator grant (POLTDES). The Würzburg Group acknowledges support by the state of Bavaria, and the DFG within project SCHN1376-3.1.en
dc.description.abstractCavity–polaritons in semiconductor microstructures have emerged as a promising system for exploring non-equilibrium dynamics of many-body systems1. Key advances in this field, including the observation of polariton condensation2 , superfluidity3, realization of topological photonic bands4, and dissipative phase transitions5–7, generically allow for a description based on a mean-field Gross–Pitaevskii formalism. Observation of polariton intensity squeezing8,9 and decoherence of a polarization entangled photon pair by a polariton condensate10, on the other hand, demonstrate quantum effects that show up at high polariton occupancy. Going beyond and into the regime of strongly correlated polaritons requires the observation of a photon blockade effect11,12 where interactions are strong enough to suppress double occupancy of a photonic lattice site. Here, we report evidence of quantum correlations between polaritons spatially confined in a fibre cavity. Photon correlation measurements show that careful tuning of the coupled system can lead to a modest reduction of simultaneous two-polariton generation probability by 5%. Concurrently, our experiments allow us to measure the polariton interaction strength, thereby resolving the controversy stemming from recent experimental reports13. Our findings constitute an essential step towards the realization of strongly interacting photonic systems.
dc.relation.ispartofNature Materialsen
dc.rightsCopyright © The Author(s), under exclusive licence to Springer Nature Limited 2019. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectQC Physicsen
dc.subjectMechanical Engineeringen
dc.subjectMechanics of Materialsen
dc.subjectMaterials Science(all)en
dc.subjectCondensed Matter Physicsen
dc.titleTowards polariton blockade of confined exciton–polaritonsen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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