Superfluorescence from photoexcited semiconductor quantum wells: Magnetic field, temperature, and excitation power dependence

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dc.citation.firstpage235448en_US
dc.citation.issueNumber23en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber91en_US
dc.contributor.authorCong, Kankanen_US
dc.contributor.authorWang, Yongruien_US
dc.contributor.authorKim, Ji-Heeen_US
dc.contributor.authorNoe, G. Timothy IIen_US
dc.contributor.authorMcGill, Stephen A.en_US
dc.contributor.authorBelyanin, Alexeyen_US
dc.contributor.authorKono, Junichiroen_US
dc.date.accessioned2016-06-10T19:50:42Zen_US
dc.date.available2016-06-10T19:50:42Zen_US
dc.date.issued2015en_US
dc.description.abstractSuperfluorescence (SF) is a many-body process in which a macroscopic polarization spontaneously builds up from an initially incoherent ensemble of excited dipoles and then cooperatively decays, producing a delayed pulse of coherent radiation. SF arising from electron-hole recombination has recently been observed in In0.2Ga0.8As/GaAs quantum wells [G. T. Noe et al., Nature Phys. 8, 219 (2012) and J.-H. Kim et al., Sci. Rep. 3, 3283 (2013)], but its observability conditions have not been fully established. Here, by performing magnetic field (B), temperature (T), and pump power (P) dependent studies of SF intensity, linewidth, and delay time through time-integrated and time-resolved magnetophotoluminescence spectroscopy, we have mapped out the B−T−P region in which SF is observable. In general, SF can be observed only at sufficiently low temperatures, sufficiently high magnetic fields, and sufficiently high laser powers with characteristic threshold behavior. We provide theoretical insights into these behaviors based primarily on considerations on how the growth rate of macroscopic coherence depends on these parameters. These results provide fundamental new insight into electron-hole SF, highlighting the importance of Coulomb interactions among photogenerated carriers as well as various scattering processes that are absent in SF phenomena in atomic and molecular systems.en_US
dc.identifier.citationCong, Kankan, Wang, Yongrui, Kim, Ji-Hee, et al.. "Superfluorescence from photoexcited semiconductor quantum wells: Magnetic field, temperature, and excitation power dependence." <i>Physical Review B,</i> 91, no. 23 (2015) American Physical Society: 235448. http://dx.doi.org/10.1103/PhysRevB.91.235448.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.91.235448en_US
dc.identifier.urihttps://hdl.handle.net/1911/90501en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleSuperfluorescence from photoexcited semiconductor quantum wells: Magnetic field, temperature, and excitation power dependenceen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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