Figure 3.

Analysis of the preparation fidelity via XX-X photon cross-correlation experiments: (a) Measured cross-correlation histogram after polarization and blinking correction (grey bars), matching the Monte Carlo simulation (orange line) of expected polarization-filtered XX-X correlation for a QD with a DOP of 33% and a preparation fidelity of 81%. (b) Comparison of polarization-corrected and integrated coincidences at π-power (red) and at 2π-power (gray, shifted for clarity) shows difference in preparation fidelity. (c) Summed XX and X emission intensity oscillation as a function of excitation power with Rabi fit from Figure 2a (orange line) for comparison. (d) Preparation fidelity extracted from cross-correlation histograms as a function of excitation power. Red and gray circles indicate the data sets shown in panel (b) (orange line is a guide to the eye).