Spontaneous spectral diffusion in CdSe quantum dots

Fernee, Mark J., Plakhotnik, Taras, Louyer, Yann, Littleton, Bradley N., Potzner, Christian, Tamarat, Philippe, Mulvaney, Paul and Lounis, Brahim (2012) Spontaneous spectral diffusion in CdSe quantum dots. Journal of Physical Chemistry Letters, 3 12: 1716-1720. doi:10.1021/jz300456h

Author Fernee, Mark J.
Plakhotnik, Taras
Louyer, Yann
Littleton, Bradley N.
Potzner, Christian
Tamarat, Philippe
Mulvaney, Paul
Lounis, Brahim
Title Spontaneous spectral diffusion in CdSe quantum dots
Journal name Journal of Physical Chemistry Letters   Check publisher's open access policy
ISSN 1948-7185
Publication date 2012-06-01
Sub-type Article (original research)
DOI 10.1021/jz300456h
Volume 3
Issue 12
Start page 1716
End page 1720
Total pages 5
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a random process. Here, we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anticorrelations in time series of spectral jumps. The anticorrelation indicates that there is an enhanced probability of the charge distribution around the nanocrystal returning to a previous configuration. We show both statistically and directly that this memory manifests as an observable spontaneous "relaxation" in the absence of a pump laser, so that spectral diffusion progresses in a manner of "two steps forward and one step back".
Keyword Semiconductor nanocrystals
Surface traps
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 26 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 25 times in Scopus Article | Citations
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