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.
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|
|Last Modified: ||26 Jul 2012 16:07|
|Identification Number: |
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