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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 E. A. Viktorov et al., Appl. Phys. Lett. 94, 263502 (2009) and may be found at

This study has been supported by Science Foundation Ireland under the Contract No. 07/IN.1/I929, the Tyndall National Access Programme, the INSPIRE programme funded by the Irish Government's Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007-2013, and the Institutes of Technology Ireland funding under the Technological Sector Research Strand 1 programme. The authors in Bruxelles acknowledge support of the Fonds National de la Recherche Scientifique (Belgium).


The nonlinear recovery of quantum dot based reverse-biased waveguide absorbers is investigated both experimentally and analytically. We show that the recovery dynamics consists of a fast initial layer followed by a relatively slow decay. The fast recovery stage is completely determined by the intradot properties, while the slow stage depends on the escape from the dot to the wetting layer.