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Magneto-photoluminescence of negatively charged excitons in narrow quantum wells

Vanhoucke, Tony and Hayne, Manus and Henini, Mohamed and Moshchalkov, Victor V (2001) Magneto-photoluminescence of negatively charged excitons in narrow quantum wells. Physical Review B, 63 (12). p. 125331. ISSN 1550-235X

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    Abstract

    We present the results of photoluminescence experiments on the negatively charged exciton X- in GaAs/AlxGa1-xAs quantum wells (QW) in high magnetic fields (<~ 50 T). Three different QW widths are used here: 100, 120, and 150 Å. All optically allowed transitions of X- are observed, enabling us to experimentally verify its energy-level diagram. All samples behave consistently with this diagram. We have determined the binding energy Eb of the singlet and triplet state of X- between 23 and 50 T for the 120 and 150 Å QW, while only the triplet Eb is observed for the 100 Å QW. A detailed comparison with recent theoretical calculations shows an agreement for all samples across this entire field range.

    Item Type: Article
    Journal or Publication Title: Physical Review B
    Additional Information: First experimental observation of 'dark' and 'bright' triplets of the negatively-charged trion. Measured binding energies of all trion states (singlet, dark & bright triplets) confirmed the theory of W'js et al. PRB 62, 4630 (2001), resolving a controversy. International collaboration. 27 citations. RAE_import_type : Journal article RAE_uoa_type : Physics ©2001 The American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 2283
    Deposited By: ep_importer
    Deposited On: 04 Apr 2008 09:16
    Refereed?: Yes
    Published?: Published
    Last Modified: 09 Apr 2014 20:26
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/2283

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