Characterizing quantum-dot blinking using noise power spectra

Matthew Pelton, David G. Grier, Philippe Guyot-Sionnest

    Research output: Contribution to journalArticle

    Abstract

    The colloidal semiconductor quantum-dot blinking was analyzed using noise power spectra. By exciting the quantum-dot (QDs) with stable laser light having a wavelength of 532 nm, the noise measurements were made at room temperature. It was shown that fluctuations in the fluorescence from microscopic ensembles of colloidal semiconductor quantum dots have the spectral form of 1/f noise. The results show that the measured power spectral density reflects the fluorescence intermittency of individual dots with power-law distribution of 'on' and 'off' times and can thus serve as a simple method for characterizing such blinking behavior.

    Original languageEnglish (US)
    Pages (from-to)819-821
    Number of pages3
    JournalApplied Physics Letters
    Volume85
    Issue number5
    DOIs
    StatePublished - Aug 2 2004

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    blinking
    noise spectra
    power spectra
    quantum dots
    fluorescence
    intermittency
    noise measurement
    room temperature
    wavelengths
    lasers

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Characterizing quantum-dot blinking using noise power spectra. / Pelton, Matthew; Grier, David G.; Guyot-Sionnest, Philippe.

    In: Applied Physics Letters, Vol. 85, No. 5, 02.08.2004, p. 819-821.

    Research output: Contribution to journalArticle

    Pelton, M, Grier, DG & Guyot-Sionnest, P 2004, 'Characterizing quantum-dot blinking using noise power spectra', Applied Physics Letters, vol. 85, no. 5, pp. 819-821. https://doi.org/10.1063/1.1779356
    Pelton, Matthew ; Grier, David G. ; Guyot-Sionnest, Philippe. / Characterizing quantum-dot blinking using noise power spectra. In: Applied Physics Letters. 2004 ; Vol. 85, No. 5. pp. 819-821.
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