Characterizing quantum-dot blinking using noise power spectra

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

doi:10.1063/1.1779356

Characterizing quantum-dot blinking using noise power spectra

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

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	819-821
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	5
DOIs	https://doi.org/10.1063/1.1779356
State	Published - Aug 2 2004

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1779356

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title = "Characterizing quantum-dot blinking using noise power spectra",

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.",

author = "Matthew Pelton and Grier, {David G.} and Philippe Guyot-Sionnest",

note = "Funding Information: The authors would like to thank C. Wang for fabricating the quantum dots, and V. Bindokas for valuable assistance with microscopic measurements. This work was principally supported by the MRSEC program of the NSF through Grant No. DMR-0213745, with additional support from NSF Grant No. DMR-0304906 and the donors of the Petroleum Research Fund of the American Chemical Society.",

year = "2004",

month = aug,

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doi = "10.1063/1.1779356",

language = "English (US)",

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journal = "Applied Physics Letters",

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T1 - Characterizing quantum-dot blinking using noise power spectra

AU - Pelton, Matthew

AU - Grier, David G.

AU - Guyot-Sionnest, Philippe

N1 - Funding Information: The authors would like to thank C. Wang for fabricating the quantum dots, and V. Bindokas for valuable assistance with microscopic measurements. This work was principally supported by the MRSEC program of the NSF through Grant No. DMR-0213745, with additional support from NSF Grant No. DMR-0304906 and the donors of the Petroleum Research Fund of the American Chemical Society.

PY - 2004/8/2

Y1 - 2004/8/2

N2 - 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.

AB - 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.

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Characterizing quantum-dot blinking using noise power spectra

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