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Negatively Charged Excitons in CdTe‐Based Quantum Wells: A Time‐Resolved Study
Author(s) -
Ciulin V.,
Kossacki P.,
Haacke S.,
Ganière J.D.,
Deveaud B.,
Esser A.,
Kutrowski M.,
Wojtowicz T.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200110)227:2<307::aid-pssb307>3.0.co;2-w
Subject(s) - exciton , photoluminescence , delocalized electron , biexciton , radiative transfer , recoil , trion , quantum well , physics , atomic physics , electron , molecular physics , condensed matter physics , optics , laser , nuclear physics , quantum mechanics
Using time‐resolved photoluminescence, we have investigated the radiative behavior of neutral and negatively charged excitons in CdTe‐based quantum wells. We find that the photoluminescence of negatively charged excitons can be well reproduced by a model of delocalized and thermalized three‐particle complexes. A large radiative zone in k ‐space results from the transfer of the charged exciton momentum to the remaining electron (recoil effect). On the other hand, the photoluminescence decay of excitons is not well described in the framework of a model of delocalized and thermalized excitons. We infer that the main difference between the behavior of neutral and charged excitons in the time domain stems from the large radiative zone of charged excitons.