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Spontaneous spectral diffusion in CdSe quantum dots
Language
en
Article de revue
This item was published in
Journal of Physical Chemistry Letters. 2012-06-21, vol. 3, n° 12, p. 1716-1720
American Chemical Society
English Abstract
Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a purely random process. Here we show that each new spectral position has a finite memory of previous spectral positions, ...Read more >
Spectral diffusion of the emission line of single colloidal nanocrystals is generally regarded as a purely random process. Here we show that each new spectral position has a finite memory of previous spectral positions, as evidenced by persistent anti-correlations in time series of spectral jumps. The anti-correlation indicates there is a finite 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.Read less <
English Keywords
CdSe nanocrystals
spectral diffusion
Origin
Hal imported