Trion dynamics in coupled double quantum wells. Electron density effects

Details Trion dynamics in coupled double quantum wells. Electron density effects Trion dynamics in coupled double quantum wells. Electron density effects

2004-07-12

arxiv.org/abs/cond-mat/0407288v1

Physics

Condensed Matter

Materials Science

14 pages, 13 figures

Scientific paper

10.1063/1.1949717

We have studied the coherent dynamics of injected electrons when they are either free or bounded both in excitons and in trions (charged excitons). We have considered a remotely doped asymmetric double quantum well where an excess of free electrons and the direct created excitons generate trions. We have used the matrix density formalism to analyze the electron dynamics for different concentration of the three species. Calculations show a significant modification of the free electron inter-sublevel oscillations cWe have studied the coherent dynamics of injected electrons when they are aused by electrons bound in excitons and trions. Based on the present calculations we propose a method to detect trions through the emitted electromagnetic radiation or the current density.

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