Memory in quantum-dot photoluminescence blinking

Details Memory in quantum-dot photoluminescence blinking Memory in quantum-dot photoluminescence blinking

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005njph....7..197s&link_type=abstract

New Journal of Physics, Volume 7, Issue 1, pp. 197 (2005).

Physics

7

Scientific paper

We demonstrate that subsequent on- and off-times of the luminescence blinking of semiconductor quantum dots (QDs) are correlated, indicating that the process behind is not memoryless. A residual memory, which has been overlooked in previous investigations of the blinking, is found to last for several (~40) detected on/off cycles. No influence of the substrate nature or the excitation intensity is observed, pointing to a process intrinsic to the QDs. These results should encourage re-analysis of existing data and may represent the key to understand the underlying physical mechanism of QD luminescence blinking.

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