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dc.contributor.authorBrodbeck, S.
dc.contributor.authorSuchomel, H.
dc.contributor.authorAmthor, M.
dc.contributor.authorSteinl, T.
dc.contributor.authorKamp, M.
dc.contributor.authorSchneider, C.
dc.contributor.authorHoefling, Sven
dc.date.accessioned2016-09-09T12:30:11Z
dc.date.available2016-09-09T12:30:11Z
dc.date.issued2016-09-16
dc.identifier.citationBrodbeck , S , Suchomel , H , Amthor , M , Steinl , T , Kamp , M , Schneider , C & Hoefling , S 2016 , ' Observation of the transition from lasing driven by a bosonic to a fermionic reservoir in a GaAs quantum well microcavity ' , Physical Review Letters , vol. 117 , no. 12 , 127401 . https://doi.org/10.1103/PhysRevLett.117.127401en
dc.identifier.issn0031-9007
dc.identifier.otherPURE: 245405458
dc.identifier.otherPURE UUID: 17766989-4c2b-4ea5-8852-705780879e45
dc.identifier.otherScopus: 84990212231
dc.identifier.otherWOS: 000383344000020
dc.identifier.urihttps://hdl.handle.net/10023/9466
dc.description.abstractWe show that by monitoring the free carrier reservoir in a GaAs-based quantum well microcavity under non-resonant pulsed optical pumping, lasing supported by a fermionic reservoir (photon lasing) can be distinguished from lasing supported by a reservoir of bosons (polariton lasing). Carrier densities are probed by measuring the photocurrent between lateral contacts deposited directly on the quantum wells of a microcavity that are partially exposed by wet chemical etching. We identify two clear thresholds in the input-output characteristic of the photoluminescence signal which can be attributed to polariton and photon lasing, respectively. The power dependence of the probed photocurrent shows a distinct kink at the threshold power for photon lasing due to increased radiative recombination of free carriers as stimulated emission into the cavity mode sets in. At the polariton lasing threshold on the other hand, the nonlinear increase of the luminescence is caused by stimulated scattering of exciton-polaritons to the ground state which do not contribute directly to the photocurrent.
dc.format.extent5
dc.language.isoeng
dc.relation.ispartofPhysical Review Lettersen
dc.rights© 2016, American Physical Society. This work is 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 journals.aps.org / https://doi.org/10.1103/PhysRevLett.117.127401en
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTen
dc.titleObservation of the transition from lasing driven by a bosonic to a fermionic reservoir in a GaAs quantum well microcavityen
dc.typeJournal articleen
dc.description.versionPostprinten
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/10.1103/PhysRevLett.117.127401
dc.description.statusPeer revieweden


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