1ILM - Institut Lumière Matière [Villeurbanne] (UMR5306 CNRS Université Claude Bernard Lyon 1 Domaine Scientifique de La Doua Bâtiment Kastler, 10 rue Ada Byron 69622 Villeurbanne CEDEX, Franc - France)
Abstract : We present an unbiased and robust analysis method for power-law blinking statistics in the photoluminescence of single nanoemitters, allowing us to extract both the bright- and dark-state power-law exponents from the emitters’ intensity autocorrelation functions. As opposed to the widely used threshold method, our technique therefore does not require discriminating the emission levels of bright and dark states in the experimental intensity timetraces. We rely on the simultaneous recording of 450 emission timetraces of single CdSe/CdS core/shell quantum dots at a frame rate of 250 Hz with single photon sensitivity. Under these conditions, our approach can determine ON and OFF power-law exponents with a precision of 3% from a comparison to numerical simulations, even for shot-noise-dominated emission signals with an average intensity below 1 photon per frame and per quantum dot. These capabilities pave the way for the unbiased, threshold-free determination of blinking power-law exponents at the microsecond time scale.
Type de document :
Article dans une revue
ACS Nano, American Chemical Society, 2015, 9 (1), pp.886-893. 〈10.1021/nn506598t〉
http://hal.in2p3.fr/in2p3-01128805
Contributeur : Dominique Girod
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Soumis le : mardi 10 mars 2015 - 14:01:21
Dernière modification le : mardi 11 décembre 2018 - 01:22:51
J. Houel, Q.T. Doan, T. Cajgfinger, G. Ledoux, D. Amans, et al.. Autocorrelation Analysis for the Unbiased Determination of Power-Law Exponents in Single-Quantum-Dot Blinking. ACS Nano, American Chemical Society, 2015, 9 (1), pp.886-893. 〈10.1021/nn506598t〉. 〈in2p3-01128805〉
