Sanvitto, D;
Whittaker, DM;
Shields, AJ;
Simmons, MY;
Ritchie, DA;
Pepper, M;
(2002)
Origin of the oscillator strength of the triplet state of a trion in a magnetic field.
PHYS REV LETT
, 89
(24)
, Article 246805. 10.1103/PhysRevLett.89.246805.
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Abstract
The dynamics of the spin-triplet trion state, under high magnetic field in a GaAs/AlGaAs quantum well, are studied using time resolved spectroscopy. The oscillator strength of the triplet transition is shown to rise with increasing electron density, in good agreement with a theoretical model where the trion interacts with excess electrons in the quantum well. This analysis suggests that the spin-triplet trion state, which is expected to be an optically "dark" state, is experimentally observable due to the interactions with the excess electrons, demonstrating that X- cannot be regarded as an isolated three particle complex.
| Type: | Article |
|---|---|
| Title: | Origin of the oscillator strength of the triplet state of a trion in a magnetic field |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.89.246805 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.89.246805 |
| Language: | English |
| Keywords: | NEGATIVELY CHARGED EXCITONS, GAAS QUANTUM-WELLS, 2-DIMENSIONAL ELECTRON-GAS, PHOTOLUMINESCENCE, DYNAMICS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1314350 |
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