Nonlinear optical dynamics of excitons and trions

We investigate the nonlinear optical dynamics of excitons and trions in CdTe modulation-doped quantum wells by time and spectrally resolved pump-probe experiments. We find that the nonlinearities induced by excitons are different from those due to the presence of the trions. From a comparison between the exciton and trion behaviours, we show that, at low temperature, trions are formed from excitons in about 10 picoseconds and, as the temperature is increased, a thermal equilibrium is reached between exciton and trion populations within 5 picoseconds.


Published in:
Physica Status Solidi B-Basic Research, 238, 3, 513-516
Year:
2003
ISSN:
0370-1972
Keywords:
Note:
Ecole Polytech Fed Lausanne, IPEQ, CH-1015 Lausanne, Switzerland. Univ Calif Santa Barbara, Inst Quantum Engn Sci & Technol, Santa Barbara, CA 93106 USA. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Portella-Oberli, MT, Ecole Polytech Fed Lausanne, IPEQ, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 714QK
Times Cited: 2
Cited Reference Count: 11
Cited References:
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 Record created 2007-08-31, last modified 2018-03-17


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