Superfluorescence

Schuurmans, M. F. H.; Vrehen, Q. H. F.; Polder, D.; Gibbs, H. M.

doi:10.1016/s0065-2199(08)60069-x

Cited by 50 publications

(32 citation statements)

References 53 publications

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“…In the present experiments, insufficient time resolution of the measurement led to difficulties in the evaluation of the excitation intensity dependence of the delay time since no change in the latter could be observed. Furthermore, the experimental time profiles were obtained by averaging many pulses, while the characteristics of superfluorescence had to be evaluated for individual pulses [29]. Therefore, we are unable to discuss the quantitative agreement of the delay time τ 0 with the superfluorescent behavior.…”

Section: Cooperative Spontaneous Emission From Extended States Inmentioning

confidence: 99%

“…While Dicke did not distinguish between the terms SR and superfluorescence (SF), and in fact, never mentioned SF, subsequent studies (e.g., [25][26][27][28][29]) have established the following semantic convention: i) SR results when the co- by emitting a pulse with peak intensity Imax ∝ N 2 . (b) Typical level scheme for a SR experiment.…”

Section: Introduction a Dicke Phenomenamentioning

confidence: 99%

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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: Cooperative Spontaneous Emission From Extended States Inmentioning

confidence: 99%

Section: Introduction a Dicke Phenomenamentioning

confidence: 99%

Dicke superradiance in solids [Invited]

et al. 2016

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“…It is well-known from the theory of superradiance 34,35 heterostructures. 36 Therefore, estimated values of the critical temperature are in qualitative agreement with available experimental data [24][25][26][27][28] .…”

Section: Figure 4 Illustrates the Dependence Of W(t)mentioning

confidence: 99%

Condensation of electron-hole pairs in a degenerate semiconductor at room temperature

Vasil'ev

Smetanin

2006

Phys. Rev. B

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It has been theoretically shown that in large-density semiconductor plasma there exist an energy level of a bound electron-hole pair (a composite boson) at the band gap. Filling this level up occurs through the condensation of electron-hole pairs with the use of mediating photons of a resonant electromagnetic field. We have demonstrated that in the case of a strong degeneracy of the plasma the critical temperature of the condensation is determined by the Fermi energies of the plasma components rather than the order parameter ∆. The critical temperature can exceed 300 K at electron-hole densities as large as 6 . 1018 cm -3 . The theoretical model is consistent with available experimental data.

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“…The amplification of this "Coherence brightened laser" is provided by electronic coherence: "The memory of the previously emitted electromagnetic field is burned into the radiating system rather than being sent back into the radiating system by the use of mirrors [49]." The key feature of superradiance (or superfluorescence) [54][55][56][57][58] is that spontaneous emission is not a single-atom process, but a collective process of all atoms, leaving the atoms in a coherent superposition of ground and excited states [59]. The condensate at rest "pumped" by the off-resonant laser corresponds to the electronically excited state in the Dicke case.…”

Section: Relation To Other Non-linear Phenomenamentioning

confidence: 99%

Spinor Condensates and Light Scattering from Bose-Einstein Condensates

Stamper-Kurn¹,

Ketterle²

Les Houches - Ecole D’Ete De Physique Theorique

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Superfluorescence

Cited by 50 publications

References 53 publications

Dicke superradiance in solids [Invited]

Dicke superradiance in solids [Invited]

Condensation of electron-hole pairs in a degenerate semiconductor at room temperature

Spinor Condensates and Light Scattering from Bose-Einstein Condensates

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