Characterizing Quantum-Dot Blinking Using Noise Power Spectra
Matthew Pelton, David Grier, Philippe Guyot-Sionnest
Abstract
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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