Temperature dependence of photoluminescence dynamics of exciton-exciton inelastic scattering in a GaAs/AlAs multiple-quantum-well structure

We have investigated the photoluminescence (PL) dynamics of exciton-exciton inelastic scattering at temperatures from 10 to 60 K. It was found that the energy dependence of the PL decay rate is scaled by that of the group velocity of the photon-like lower polariton (LP) at each temperature, taking a...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1220; no. 1; pp. 12026 - 12029
Main Authors Miyazaki, Yuichiro, Nakayama, Masaaki
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2019
Subjects
Decay rate
Dynamic structural analysis
Excitons
Group velocity
Inelastic scattering
Photoluminescence
Photons
Physics
Polaritons
Quantum wells
Temperature dependence
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Summary:We have investigated the photoluminescence (PL) dynamics of exciton-exciton inelastic scattering at temperatures from 10 to 60 K. It was found that the energy dependence of the PL decay rate is scaled by that of the group velocity of the photon-like lower polariton (LP) at each temperature, taking account of the broadening factor of the polariton state. This fact demonstrates that the PL decay rate is dominated by the photon-like LP which is the final state of the exciton-exciton inelastic scattering process. The broadening factor is proportional to temperature, which indicates the influence of acoustic phonon scattering on the LP state.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1220/1/012026