Abstract
Magneto-photoluminescence (PL) experiments were carried out on a self-assembled CdZnSe/ZnSe quantum dot (QD) system. The intensities of the PL peak exhibited significant differences for the two circular polarizations when a magnetic field was applied. A simple two-level rate equation model, including the spin flip time r, and the exciton recombination time rr , was used to analyze the observed degree of the polarization in the polarization selective PL measurements. Specifically, the magnetic field dependence of the polarization was fitted by treating T,/TT as a fitting parameter in the model. The best fitting was obtained with the value of ra/rr ~ a, indicating that the spin relaxation time is much longer than the exciton recombination time. Such polarization selective PL measurements were further performed at several different temperatures, which showed a systematic decrease in the degree of polarization with increasing temperature.
Original language | English |
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Pages (from-to) | 76-79 |
Number of pages | 4 |
Journal | Journal of the Korean Physical Society |
Volume | 55 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2009 Jul |
Keywords
- Polarization
- Self-assembled quantum dot
- Spin relaxation
ASJC Scopus subject areas
- General Physics and Astronomy