Abstract
In a recent experiment, we reported the time-domain intensity noise measurement of a single-photon source relying on single-molecule fluorescence control. In this paper, we present data processing starting from photocount timestamps. The theoretical analytical expression of the time-dependent Mandel parameter Q(T) of an intermittent single-photon source is derived from ON↔OFF dynamics. Finally, source intensity noise analysis, using the Mandel parameter, is quantitatively compared with the usual approach relying on the time autocorrelation function, both methods yielding the same molecular dynamical parameters.
Highlights
Optical experiments at the level of single quantum emitters allow one to produce specific quantum states of light with photon statistics that deviate strongly from classical distributions [1, 2]
In these experiments, the actual performance of quantum key distribution (QKD) is intrinsically linked to photon statistics of the single photon source [8]
We showed that measured photon statistics strongly deviates from Poisson law, clearly exhibiting non-classical features
Summary
Optical experiments at the level of single quantum emitters allow one to produce specific quantum states of light with photon statistics that deviate strongly from classical distributions [1, 2]. Recent experiments reported quantum key distribution (QKD) with polarisation encoding on single photons [6, 7] They revealed potential gain of such sources over systems relying on strongly attenuated laser pulses. In these experiments, the actual performance of QKD is intrinsically linked to photon statistics of the single photon source [8]. Among various experimental realizations of single photon sources [12, 13, 14, 15, 16, 17, 18], a molecular-based SPS presents several advantages It can be driven at room temperature with a relatively simple setup which achieves global efficiency exceeding 5 % for single photon production and detection. We detail the steps of this work, from realization of a molecular-based SPS to extensive statistical analysis of detected photons
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