Spectroscopy of single II-VI nanocrystals

1- and 2-photon excitation of single semiconductor nanocrystals

Recently we proposed a model [1, 2] to explain the blinking statistics of capped and uncapped semiconductor nanocrystals. (See also “Photophysics of semiconductor nanocrystals”) This model ascribes an important role to the surrounding matrix of the nanocrystal. Although several groups did experiments on nanocrystals in various matrices before, none of them performed a systematic investigation on the influence of the matrix on the blinking behavior. We want to find out whether there is any effect of the matrix in an extension of earlier work on the two-photon excitation of single II-VI nanocrystals [3]. This will constitute an important test for our model.

  1. R. Verberk, A.M. van Oijen, M. Orrit
    “Simple model for the power-law blinking of single semiconductor nanocrystals”
    Phys. Rev. B 66 (2002) 233202
  2. R. Verberk, M. Orrit
    “Photon statistics in the fluorescence of single molecules and nanocrystals: Correlation functions versus distributions of on- and off-times”
    J. Chem. Phys. 119 (2003) 2214-2222
  3. A.M. van Oijen, Y. Durand, R. Verberk, J. Schmidt, A. Meijerink
    “Continuous-wave two-photon excitation of individual CdS nanocrystallites”
    Appl. Phys. Lett. 79 (2001) 830-832

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