Characterizing quantum-dot blinking using noise power spectra

Pelton, Matthew; Grier, David G.; Guyot-Sionnest, Philippe
August 2004
Applied Physics Letters;8/2/2004, Vol. 85 Issue 5, p819
Academic Journal
Fluctuations in the fluorescence from macroscopic ensembles of colloidal semiconductor quantum dots have the spectral form of 1/f noise. The measured power spectral density reflects the fluorescence intermittency of individual dots with power-law distributions of “on” and “off” times, and can thus serve as a simple method for characterizing such blinking behavior.


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