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dc.contributor.authorWang, Hui
dc.contributor.authorHe, Yu-Ming
dc.contributor.authorChung, T.-H.
dc.contributor.authorHu, Hai
dc.contributor.authorYu, Ying
dc.contributor.authorChen, Si
dc.contributor.authorDing, Xing
dc.contributor.authorChen, M.-C.
dc.contributor.authorQin, Jian
dc.contributor.authorYang, Xiaoxia
dc.contributor.authorLiu, Run-Ze
dc.contributor.authorDuan, Z.-C.
dc.contributor.authorLi, J.-P.
dc.contributor.authorGerhardt, S.
dc.contributor.authorWinkler, K.
dc.contributor.authorJurkat, J.
dc.contributor.authorWang, Lin-Jun
dc.contributor.authorGregersen, Niels
dc.contributor.authorHuo, Yong-Heng
dc.contributor.authorDai, Qing
dc.contributor.authorYu, Siyuan
dc.contributor.authorHöfling, Sven
dc.contributor.authorLu, Chao-Yang
dc.contributor.authorPan, Jian-Wei
dc.identifier.citationWang , H , He , Y-M , Chung , T-H , Hu , H , Yu , Y , Chen , S , Ding , X , Chen , M-C , Qin , J , Yang , X , Liu , R-Z , Duan , Z-C , Li , J-P , Gerhardt , S , Winkler , K , Jurkat , J , Wang , L-J , Gregersen , N , Huo , Y-H , Dai , Q , Yu , S , Höfling , S , Lu , C-Y & Pan , J-W 2019 , ' Towards optimal single-photon sources from polarized microcavities ' , Nature Photonics .
dc.identifier.otherPURE: 259361588
dc.identifier.otherPURE UUID: 6fdc92f1-bae7-4397-9e87-cd4aaf9fd951
dc.identifier.otherScopus: 85070334081
dc.identifier.otherWOS: 000493317900012
dc.description.abstractAn optimal single-photon source should deterministically deliver one, and only one, photon at a time, with no trade-off between the source’s efficiency and the photon indistinguishability. However, all reported solid-state sources of indistinguishable single photons had to rely on polarization filtering, which reduced the efficiency by 50%, fundamentally limiting the scaling of photonic quantum technologies. Here, we overcome this long-standing challenge by coherently driving quantum dots deterministically coupled to polarization-selective Purcell microcavities. We present two examples: narrowband, elliptical micropillars and broadband, elliptical Bragg gratings. A polarization-orthogonal excitation–collection scheme is designed to minimize the polarization filtering loss under resonant excitation. We demonstrate a polarized single-photon efficiency of 0.60 ± 0.02 (0.56 ± 0.02), a single-photon purity of 0.975 ± 0.005 (0.991 ± 0.003) and an indistinguishability of 0.975 ± 0.006 (0.951 ± 0.005) for the micropillar (Bragg grating) device. Our work provides promising solutions for truly optimal single-photon sources combining near-unity indistinguishability and near-unity system efficiency simultaneously.
dc.relation.ispartofNature Photonicsen
dc.rights© 2019, the Author(s). 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 as such may differ slightly from the final published version. The final published version of this work is available at
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleTowards optimal single-photon sources from polarized microcavitiesen
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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