Quantum confinement of excitons and their relaxation processes in CuCl microcrystals

Itoh, Tadashi; Ikehara, Tsuyoshi; Iwabuchi, Y.

doi:10.1016/0022-2313(90)90097-u

Cited by 49 publications

(29 citation statements)

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“…Experimentally, size-dependent radiative decay in nanocrystals, expected for excitonic SR as described above, have been demonstrated [137,138]. Nakamura, Yamada, and Tokizaki studied the radiative decay of resonantly excited excitons confined in CuCl semiconducting nanocrystals with radii, R, of 18-77 Å in glass matrices.…”

Section: A Excitonic Superradiance In Semiconductormentioning

confidence: 93%

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: A Excitonic Superradiance In Semiconductormentioning

confidence: 93%

Dicke superradiance in solids [Invited]

et al. 2016

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“…Finally, it should be noted that the radiative decay of the exciton shows the exciton superradiance, in which the radiative decay of confined exciton in weak confinement (exciton confinement) regime is proportional to the volume of a single QD [12,13]. The exciton-SR is due to the coherent nature of exciton in a dot.…”

Section: Resultsmentioning

confidence: 98%

Temporal behavior of biexciton luminescence under two-photon excitation in CuCl quantum dots

Kagotani

Miyajima

Saito

et al. 2006

Journal of Luminescence

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“…According to theoretical estimation [13], a shortening of the decay time for the microcrystalline inclusions would be observed when the diameter of the inclusions is d ≤ 10r ex , where r ex is the exciton radius of the corresponding single crystal. The diameter of CsPbCl 3 microinclusions is not larger than 10 nm, since r ex for the CsPbCl 3 single crystal is equal to 9.8 Å [12].…”

Section: Luminescence Decay Kinetics Of Cspbcl 3 Microcrystalsmentioning

confidence: 99%

The spectral luminescence characteristicsof RbPbCl₃ : Cs crystals in the 4–20 eV region

Voloshinovskii

Myagkota

Gloskovskii

et al. 2003

Physica Status Solidi (b)

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Investigations of luminescence kinetics properties of CsPbCl 3 microcrystals dispersed in RbPbCl 3 matrices have been carried out under excitation with synchrotron radiation in the energy region E exc = 4 -20 eV. Different time components are registered in the decay kinetics of CsPbCl 3 microcrystals, appearing due to the direct excitation of the microcrystals or reabsorption of the intrinsic emission of the RbPbCl 3 matrix. A shortening of the luminescence decay time of the CsPbCl 3 microcrystals with respect to that observed for a CsPbCl 3 single crystal can be explained as evidence of the quantum size effect.

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Quantum confinement of excitons and their relaxation processes in CuCl microcrystals

Cited by 49 publications

References 10 publications

Dicke superradiance in solids [Invited]

Dicke superradiance in solids [Invited]

Temporal behavior of biexciton luminescence under two-photon excitation in CuCl quantum dots

The spectral luminescence characteristicsof RbPbCl₃ : Cs crystals in the 4–20 eV region

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Quantum confinement of excitons and their relaxation processes in CuCl microcrystals

Cited by 49 publications

References 10 publications

Dicke superradiance in solids [Invited]

Dicke superradiance in solids [Invited]

Temporal behavior of biexciton luminescence under two-photon excitation in CuCl quantum dots

The spectral luminescence characteristicsof RbPbCl3 : Cs crystals in the 4–20 eV region

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Product

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The spectral luminescence characteristicsof RbPbCl₃ : Cs crystals in the 4–20 eV region