1. Excitation Dynamics of CdTe∕ZnTe Quantum Dots Studied in Picosecond Timescale
- Author
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T. Kazimierczuk, M. Goryca, M. Koperski, S. Nowak, P. Wojnar, A. Golnik, J. A. Gaj, P. Kossacki, Marília Caldas, and Nelson Studart
- Subjects
Physics ,Condensed Matter::Materials Science ,Photoluminescence ,Quantum dot ,Quantum dot laser ,Exciton ,Excited state ,Picosecond ,Electron ,Atomic physics ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Excitation - Abstract
We present a study of photoluminescence dynamics of CdTe/ZnTe quantum dots using subpicosecond excitation correlation technique. The quantum dot is excited by pairs of light pulses with tuned delay between them. The variation of relative intensity of photoluminescence lines corresponding to different charge states is observed in a timescale of 20 ps when changing delay between pulses. We explain the observed effect by a simple model that assumes different trapping dynamics of electrons and holes in the quantum dot.
- Published
- 2010
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