Renormalized energies of superfluorescent bursts from an electron-hole magnetoplasma with high gain in In<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mi>x</mml:mi></mml:msub></mml:math>Ga<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>As quantum wells

Kim, J.-H.; Lee, J.; Noe, G. Timothy; Wang, Y.; Wójcik, Aleksander K.; McGill, Stephen; Reitze, D. H.; Belyanin, Alexey; Kono, Junichiro

doi:10.1103/physrevb.87.045304

Cited by 12 publications

(11 citation statements)

References 25 publications

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“…12. Two fibers, center and edge fibers, were used for PL collection; the former was used for monitoring spontaneous emission (which was emitted in all 4π spatial directions with equal probability), while the latter was used to observe SF (which was emitted in the plane of the QWs) [56,140,141,143]. TIPL was measured with a CCD-equipped monochromator, and TRPL was measured either using a streak camera system or a Kerrgate method.…”

Section: Fig 12mentioning

confidence: 99%

Dicke superradiance in solids [Invited]

et al. 2016

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Recent advances in optical studies of condensed matter systems have led to the emergence of a variety of phenomena that have conventionally been studied in the realm of quantum optics. These studies have not only deepened our understanding of light-matter interactions but also introduced aspects of many-body correlations inherent in optical processes in condensed matter systems. This article is concerned with the phenomenon of superradiance (SR), a profound quantum optical process originally predicted by Dicke in 1954. The basic concept of SR applies to a general N -body system where constituent oscillating dipoles couple together through interaction with a common light field and accelerate the radiative decay of the whole system. Hence, the term SR ubiquitously appears in order to describe radiative coupling of an arbitrary number of oscillators in many situations in modern science of both classical and quantum description. In the most fascinating manifestation of SR, known as superfluorescence (SF), an incoherently prepared system of N inverted atoms spontaneously develops macroscopic coherence from vacuum fluctuations and produces a delayed pulse of coherent light whose peak intensity ∝ N 2 . Such SF pulses have been observed in atomic and molecular gases, and their intriguing quantum nature has been unambiguously demonstrated. In this review, we focus on the rapidly developing field of research on SR phenomena in solids, where not only photon-mediated coupling (as in atoms) but also strong Coulomb interactions and ultrafast scattering processes exist. We describe SR and SF in molecular centers in solids, molecular aggregates and crystals, quantum dots, and quantum wells. In particular, we will summarize a series of studies we have recently performed on semiconductor quantum wells in the presence of a strong magnetic field. In one type of experiment, electron-hole pairs were incoherently prepared, but a macroscopic polarization spontaneously emerged and cooperatively decayed, emitting an intense SF burst. In another type of experiment, we observed the SR decay of coherent cyclotron resonance of ultrahigh-mobility two-dimensional electron gases, leading to a decay rate that is proportional to the electron density. These results show that cooperative effects in solid-state systems are not merely small corrections that require exotic conditions to be observed; rather, they can dominate the nonequilibrium dynamics and light emission processes of the entire system of interacting electrons.

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Section: Fig 12mentioning

confidence: 99%

Dicke superradiance in solids [Invited]

et al. 2016

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“…Using this system, we have extended our most recent studies on superfluorescence from a highdensity electron-hole plasma in semiconductor quantum wells [40][41][42] to higher magnetic field strengths and with better temporal resolution for the time-resolved PL re- sults by developing this system.…”

Section: Discussionmentioning

confidence: 99%

“…In our previous measurements at the National High Magnetic Field Laboratory, our temporal resolution for time-resolved PL measurements was limited to 20 ps due to dispersion in the graded-index fiber that was used for collection. [40][41][42] Here, we are able to place an upper limit for the SF pulse as the temporal resolution is limited by the Kerr medium, which, for toluene, is 1 ps.…”

Section: Time-integrated Photoluminescence and Absorption Spectroscopymentioning

confidence: 97%

A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T

Noe

Nojiri

Lee

et al. 2013

Review of Scientific Instruments

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We have developed a mini-coil pulsed magnet system with direct optical access, ideally suited for nonlinear and ultrafast spectroscopy studies of materials in high magnetic fields up to 30 T. The apparatus consists of a small coil in a liquid nitrogen cryostat coupled with a helium flow cryostat to provide sample temperatures down to below 10 K. Direct optical access to the sample is achieved with the use of easily interchangeable windows separated by a short distance of ∼135 mm on either side of the coupled cryostats with numerical apertures of 0.20 and 0.03 for measurements employing the Faraday geometry. As a demonstration, we performed time-resolved and time-integrated photoluminescence measurements as well as transmission measurements on InGaAs quantum wells.

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“…Two fibers, center and edge fibers, were used for PL collection; the former was used for monitoring SE (which is emitted in all 4π spatial directions with equal probability) while the latter was used to observe SF (which is emitted in the plane of the quantum wells). 19,20,22 In the SF regime, the emission is strongly directional, propagating along a certain in-plane direction, but the direction changes from shot to shot.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, we observed SF in optically excited InGaAs/GaAs quantum wells by performing pump-probe and time-resolved photoluminescence measurements simultaneously. 19 Many-body renormalization of energies was noted, 20 and Coulomb enhancement of gain at the Fermi edge 21 was found to assist cooperative recombination, leading to a novel phenomenon of sequential SF bursts. 22 Overall, it has been established that Coulomb interactions among carriers and continuum of states, unique to solid states systems, distinguish solid-state SF from atomic SF.…”

Section: -14mentioning

confidence: 99%

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

et al. 2015

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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. Nat. 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 timeresolved magneto-photoluminescence 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.

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Renormalized energies of superfluorescent bursts from an electron-hole magnetoplasma with high gain in InxGa1−xAs quantum wells

Cited by 12 publications

References 25 publications

Dicke superradiance in solids [Invited]

Dicke superradiance in solids [Invited]

A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T

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

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