Fig. 3
From: Quantum dot single-photon sources with ultra-low multi-photon probability
Probabilities for different photodetection events. a Simulated values of g(2)[0] as a function of the pulse length for a resonantly driven two-level system (black) and two-photon excitation of 2X (red). Dashed line represents Poissonian statistics of driving laser. b, c Simulated photocount distribution Pn, i.e., the probability for n different detections to occur, either from the emission of b a 2LS or c a 3LS filtered on either the 2X or X′ transition frequency
