Kalt, H., Umlauff, M., Hoffmann, J., Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Hvam, J. M., Scholl, M., Söllner, J., Heuken, M., Jobst, B. and Hommel, D. 1998. Thermalization of free excitons in ZnSe quantum wells. Journal of Crystal Growth 184-18 , pp. 795-800. 10.1016/S0022-0248(98)80165-6 |
Abstract
The thermalization dynamics of hot free excitons in ZnSe quantum wells is studied by photoluminescence excitation (PLE), steady-state (cw-PL) and time-resolved photoluminescence (TRPL). Formation of excitons by emission of LO phonons is very efficient and leads to the generation of narrow hot-exciton distributions. The LO phonon-assisted recombination of the excitons is a direct monitor of the hot-exciton dynamics. A thermalized exciton distribution is reached only after some 100 ps due to the slow exciton relaxation assisted by acoustic phonons. The hot-exciton features in PLE, cw-PL and TRPL are consistently reproduced by explicitly calculating the relevant scattering processes.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QC Physics |
Uncontrolled Keywords: | Hot excitons; ZnSe quantum wells;Photoluminescence excitation; Time-resolved luminescence; Exciton-phonon coupling; Thermalization |
Publisher: | Elsevier |
ISSN: | 0022-0248 |
Last Modified: | 28 Oct 2022 08:46 |
URI: | https://orca.cardiff.ac.uk/id/eprint/72110 |
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