IndiumV3, Russie, Analysis, bibRecord, 000024

Correlation and dephasing effects on the non-radiative coherence between bright excitons in an InAs QD ensemble measured with 2D spectroscopy

Identifieur interne : 000024 ( Russie/Analysis ); précédent : 000023; suivant : 000025

Correlation and dephasing effects on the non-radiative coherence between bright excitons in an InAs QD ensemble measured with 2D spectroscopy

Auteurs : RBID : Pascal:13-0209807

Descripteurs français

Pascal (Inist)
- Déphasage, Exciton, Structure fine, Spectre transformée Fourier, Monitorage, Fluctuation, Niveau énergie, Mélange 4 ondes, Spectre optique, Arséniure d'indium, Point quantique, Semiconducteur, InAs.

English descriptors

KwdEn :
- Energy levels, Excitons, Fine structure, Fluctuations, Four-wave mixing, Fourier transform spectra, Indium arsenides, Monitoring, Optical spectrum, Phase shift, Quantum dots, Semiconductor materials.

Abstract

Exchange-mediated fine-structure splitting of bright excitons in an ensemble of InAs quantum dots is studied using optical two-dimensional Fourier-transform spectroscopy. By monitoring the non-radiative coherence between the bright states, we find that the fine-structure splitting decreases with increasing exciton emission energy at a rate of 0.1 μeV/meV. Dephasing rates are compared to population decay rates to reveal that pure dephasing causes the exciton optical coherences to decay faster than the radiative limit at low temperature, independent of excitation density. Fluctuations of the bright state transition energies are nearly perfectly correlated, protecting the non-radiative coherence from interband dephasing mechanisms.

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Pascal:13-0209807

Le document en format XML

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<author><name sortKey="Moody, G" uniqKey="Moody G">G. Moody</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>JILA, University of Colorado & National Institute of Standards and Technology</s1>
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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physics, University of Colorado</s1>
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<author><name sortKey="Singh, R" uniqKey="Singh R">R. Singh</name>
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<term>Excitons</term>
<term>Fine structure</term>
<term>Fluctuations</term>
<term>Four-wave mixing</term>
<term>Fourier transform spectra</term>
<term>Indium arsenides</term>
<term>Monitoring</term>
<term>Optical spectrum</term>
<term>Phase shift</term>
<term>Quantum dots</term>
<term>Semiconductor materials</term>
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<term>Spectre transformée Fourier</term>
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<term>Fluctuation</term>
<term>Niveau énergie</term>
<term>Mélange 4 ondes</term>
<term>Spectre optique</term>
<term>Arséniure d'indium</term>
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<front><div type="abstract" xml:lang="en">Exchange-mediated fine-structure splitting of bright excitons in an ensemble of InAs quantum dots is studied using optical two-dimensional Fourier-transform spectroscopy. By monitoring the non-radiative coherence between the bright states, we find that the fine-structure splitting decreases with increasing exciton emission energy at a rate of 0.1 μeV/meV. Dephasing rates are compared to population decay rates to reveal that pure dephasing causes the exciton optical coherences to decay faster than the radiative limit at low temperature, independent of excitation density. Fluctuations of the bright state transition energies are nearly perfectly correlated, protecting the non-radiative coherence from interband dephasing mechanisms.</div>
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Correlation and dephasing effects on the non-radiative coherence between bright excitons in an InAs QD ensemble measured with 2D spectroscopy

Correlation and dephasing effects on the non-radiative coherence between bright excitons in an InAs QD ensemble measured with 2D spectroscopy

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri