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dc.contributor.authorCong, Kankan
Wang, Yongrui
Kim, Ji-Hee
Noe, G. Timothy II
McGill, Stephen A.
Belyanin, Alexey
Kono, Junichiro
dc.date.accessioned 2016-06-10T19:50:42Z
dc.date.available 2016-06-10T19:50:42Z
dc.date.issued 2015
dc.identifier.citation Cong, Kankan, Wang, Yongrui, Kim, Ji-Hee, et al.. "Superfluorescence from photoexcited semiconductor quantum wells: Magnetic field, temperature, and excitation power dependence." Physical Review B, 91, no. 23 (2015) American Physical Society: 235448. http://dx.doi.org/10.1103/PhysRevB.91.235448.
dc.identifier.urihttps://hdl.handle.net/1911/90501
dc.description.abstract Superfluorescence (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.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article 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.
dc.title Superfluorescence from photoexcited semiconductor quantum wells: Magnetic field, temperature, and excitation power dependence
dc.type Journal article
dc.citation.journalTitle Physical Review B
dc.citation.volumeNumber 91
dc.citation.issueNumber 23
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.91.235448
dc.type.publication publisher version
dc.citation.firstpage 235448


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