High-resolution line width measurement of single CdSe nanocrystals at long time scales

Littleton, B.N., Fernee, M. J., Gomez, D. E., Mulvaney, P. and Rubinsztein-Dunlop, Halina (2009) High-resolution line width measurement of single CdSe nanocrystals at long time scales. Journal of Physical Chemistry C, 113 14: 5345-5348. doi:10.1021/jp900887r


Author Littleton, B.N.
Fernee, M. J.
Gomez, D. E.
Mulvaney, P.
Rubinsztein-Dunlop, Halina
Title High-resolution line width measurement of single CdSe nanocrystals at long time scales
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
Publication date 2009-03-17
Year available 2009
Sub-type Article (original research)
DOI 10.1021/jp900887r
Open Access Status Not yet assessed
Volume 113
Issue 14
Start page 5345
End page 5348
Total pages 4
Editor George C. Schatz
Place of publication WASHINGTON
Publisher AMER CHEMICAL SOC
Language eng
Subject C1
0206 Quantum Physics
970102 Expanding Knowledge in the Physical Sciences
Abstract Band-edge photoluminescence from single CdSe/CdZnS nanocrystals was analyzed using a confocal Fabry−Perot spectrometer with long exposure times. Due to spectral diffusion, direct detection of the line shape was not possible. However, the contrast observed in the resulting signal provided a rigorous upper bound to the single nanocrystal line width as low as 20.7 ± 0.5 μeV. This result is in excellent agreement with an asymptotic upper limit to the spectral diffusion broadened line width found at millisecond time scales, extending this time scale by 4 orders of magnitude. This indicates that spectral diffusion commonly observed at long time scales results from a physical process different from that/those responsible for the asymptotic limit.
Keyword Quantum Dots
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
2010 Higher Education Research Data Collection
 
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Created: Thu, 03 Sep 2009, 18:21:37 EST by Mr Andrew Martlew on behalf of Physics