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Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Physical Sciences and Mathematics

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in T. Erneux et al., Appl. Phys. Lett. 94, 113501 (2009) and may be found at

The authors acknowledge support of the Fonds National de la Recherche Scientifique (Belgium), Science Foundation Ireland (SFI) under Contract No. 07/IN.1/1929, the Tyndall National Access Programme and the Irish Higher Education Authority under the PRTLI program.


We consider a rate equation model of a quantum dot semiconductor optical amplifier that takes into account carrier capture, escape, and Pauli blocking processes. We evaluate possible differences between phonon-assisted or Auger processes being dominant for recovery. An analytical solution which corresponds to phonon-assisted interaction is then used to accurately fit experimental recovery curves and allows an estimation of both the carrier capture and escape rates.