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Dynamics of direct-created trions in coupled double quantum wells: Electron-density effects

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2 Author(s)
Aceituno, P. ; Departamento de Física Básica, Universidad de La Laguna, La Laguna, 38206-Tenerife, Spain ; Hernandez-Cabrera, A.

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

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 1 )