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(a) Typical quantum dot luminescence spectrum for the position marked QD-1 in the inset. Inset: Spatially resolved quantum dot luminescence detected in confocal geometry for λ = 940.2 ± 0.1 nm (highlighted in red in the spectrum). (b) Detection events as a function of power density for direct SSPD illumination, as shown in black, and for quantum dot excitation, marked as “On-Chip PL”. For comparison the confocal PL of the exciton highlighted in figure 2a is shown in blue.
