Fig. 4

Normalized second-order correlation function \(g^{(2)}(\tau )\) as a function of time-delay \(\tau\) for a single colloidal CdSe QD immersed in PMMA matrix. Experimental data is fitted to Eq. (2) (red curve). The value of \(g^{(2)}(0)\) less than 0.5 indicates the presence of a single quantum emitter inside the confocal volume.