Figure 5. Single-photon emission.

(a) μPL spectrum of the quantum dot under quasi-resonant excitation at low excitation power. (b–d) g⁽²⁾(τ) results for the X⁺ emission at pump powers of 0.5·P_Sat, P_Sat and 2·P_Sat. Analysis of corrected data (red) yields a g⁽²⁾(0)<0.01 independent of the optical excitation power.