Influence of carrier relaxation on the dynamics of stimulated emission in microcavity lasers

M. Hilpert, H. Klann, M. Hofmann, C. Ellmers, M. Oestreich, H. C. Schneider, F. Jahnke, S. W. Koch, W. W. Rühle, H. D. Wolf, D. Bernklau, H. Riechert

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Abstract

The influence of carrier relaxation on the emission dynamics of a semiconductor microcavity laser is investigated using femtosecond optical excitation. For moderate excitation intensities, the dynamics of the output laser pulse becomes significantly slower when the photon energy of the pump laser is tuned from the quantum well band-gap energy towards higher energies. Theoretical calculations reproduce this trend only if the interaction-induced dephasing of the polarization driven by the pump pulse, the formation, and relaxation of the nonequilibrium carrier distribution as well as the chirp of the excitation pulse are taken into account. Additionally, band-structure effects such as excitation of light holes influence the thermalization dynamics and lead to discontinuities in the general trend.

Original languageEnglish (US)
Pages (from-to)3761-3763
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number26
DOIs
StatePublished - Dec 29 1997

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Hilpert, M., Klann, H., Hofmann, M., Ellmers, C., Oestreich, M., Schneider, H. C., Jahnke, F., Koch, S. W., Rühle, W. W., Wolf, H. D., Bernklau, D., & Riechert, H. (1997). Influence of carrier relaxation on the dynamics of stimulated emission in microcavity lasers. Applied Physics Letters, 71(26), 3761-3763. https://doi.org/10.1063/1.120498