Optical control of a dark exciton reservoir

Kurdyubov, A. S.; Трифонов, А. В.; Gerlovin, I. Ya.; Gribakin, B. F.; Grigoryev, P. S.; Михайлов, А. В.; Ignatiev, I. V.; Efimov, Yu. P.; Eliseev, S. A.; Lovtcius, V. A.; Aßmann, Marc; Bayer, М.; Kavokin, Alexey

doi:10.1103/physrevb.104.035414

Cited by 8 publications

(4 citation statements)

References 59 publications

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“…The analysis of reflection spectra by fitting exciton resonances by formulas (1) and (2) makes it possible to determine all 4 exciton resonance parameters, Ŵ R , Ŵ NR , ω x and φ [9,10,[12][13][14][15]. In this work, we investigate the rate of radiative decay Ŵ R of the heavy-hole and light-hole excitons at each delay step between the pump and probe pulses.…”

Section: Resultsmentioning

confidence: 99%

“…Its center is shifted to the region of lower energies in order to reduce the probability of excitation of transitions between free electrons and holes, as well as the probability of creation of excitons in barriers by the highfrequency edge of the laser spectrum. Such transitions lead to filling of the reservoir of non-radiating excitons and free carriers [15], which reduces the amplitude of quantum beats.…”

Section: Resultsmentioning

confidence: 99%

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Quantum beats of light-hole and heavy-hole excitons in reflection spectra of GaAs/AlGaAs quantum well

et al. 2022

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In this work we experimentally study dynamics of the heavy-hole and light-hole exciton states in a quantum well under coherent excitation of both excitonic resonances using co- and cross-linear and circular polarizations of pump and probe beams. Oscillations of basic parameters of excitonic resonances are observed. Their dependence on the polarization of the pump and probe beams is used to determine the structure of states of the heavy-hole and light-hole excitons by means of theoretical modelling of experimental data. Keywords: quantum well, excitons, quantum beats, light-hole exciton, heavy-hole exciton.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Quantum beats of light-hole and heavy-hole excitons in reflection spectra of GaAs/AlGaAs quantum well

et al. 2022

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“…Simultaneously with the shift, the PL bands are broadened, probably due temperature range T = 10−170 K. The linear dependence is typical for the interaction with acoustic phonons. Note that the value of the constant p is tens of times higher than the analogous constant for the well-studied semiconductor GaAs [37].…”

Section: Photoluminescence Upon Non-resonant Excitationmentioning

confidence: 89%

Anti-Stokes photoluminescence of perovskite CsPbBr-=SUB=-3-=/SUB=- nanocrystals in a fluorophosphate glass matrix

Kuznetsova

Bataev

Chukeev

et al. 2022

Optics and Spectroscopy

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The anti-Stokes photoluminescence (PL) of perovskite CsPbBr3 nanocrystals in a fluorophosphate glass matrix has been found and experimentally studied upon optical excitation to the low-energy edge of the photoluminescence band. The intensity of anti-Stokes PL depends linearly on the pumping power and increases rapidly with increasing temperature. A simple three-level model is proposed that describes well the main regularities of the observed phenomenon. Keywords: perovskites, nanocrystals, anti-Stokes photoluminescence, CsPbBr3, fluorophosphate glass.

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“…We have analyzed the nonradiative broadening within the framework of a model of dynamic processes, which is developed in [14]. Resonant excitation into the light exciton resonance generates radiative excitons which either quickly relax by emitting a photon (the rate Ŵ R ), or scatter to the states outside the light cone.…”

Section: Analysis Of the Power Dependence Of The Nonradiative Broadeningmentioning

confidence: 99%

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

et al. 2022

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Basic exciton parameters, such as the energy of exciton transition and the radiative and nonradiative broadenings, are experimentally studied by means of reflectance spectroscopy for a heterostructure with a 14-nm GaAs/AlGaAs quantum well. Particular attention is paid to the nonradiative broadening which is sensitive to densities of free carriers and long-lived nonradiative excitons. A sublinear increase of the broadening of the heavy-hole and light-hole exciton resonances is observed when the light-hole exciton resonance is excited with increasing power. A simple model is developed, which allows one to well reproduce the observed dependence. Keywords: exciton, quantum well, nonradiative broadening.

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Optical control of a dark exciton reservoir

Cited by 8 publications

References 59 publications

Quantum beats of light-hole and heavy-hole excitons in reflection spectra of GaAs/AlGaAs quantum well

Quantum beats of light-hole and heavy-hole excitons in reflection spectra of GaAs/AlGaAs quantum well

Anti-Stokes photoluminescence of perovskite CsPbBr-=SUB=-3-=/SUB=- nanocrystals in a fluorophosphate glass matrix

Non-trivial dependence of spectral characteristics of excitons in quantum wells on the resonant optical excitation power

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