Applied Physics B

, Volume 62, Issue 1, pp 3–10 | Cite as

Ultrafast dynamics of carrier-induced absorption changes in highly-excited CdSe nanocrystals

  • S. Hunsche
  • T. Dekorsy
  • V. Klimov
  • H. Kurz
Regular Papers


We use femtosecond time-resolved transmission spectroscopy to study the density and time dependence of transient absorption changes of CdSe nanocrystals. Our data show pronounced absorption saturation up to complete bleaching of the lowest optical transition. At high carrier density the nonlinear spectra show several peaks that can be related to the two lowest quantized electron states. Thetime dependence of the carrier-induced absorption changes indicates an ultrafast relaxation process within the strongly broadened absorption lines.


78.47.+p 73.20.Dx 71.35,+z 


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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • S. Hunsche
    • 1
  • T. Dekorsy
    • 1
  • V. Klimov
    • 1
  • H. Kurz
    • 1
  1. 1.Institut für Halbleitertechnik IIRheinisch-Westfälische Technische Hochschule AachenAachenGermany

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