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Origin of the oscillator strength of the triplet state of a trion in a magnetic field

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. Green open access

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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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