Figure 3: Excitation power dependence of twin-photon generation.
From: A bright triggered twin-photon source in the solid state
(a) Integrated intensities of exciton and biexciton emission extracted for the V-polarized decay channel. The emission intensities of exciton and biexciton saturate at excitation powers of about 2 and 6 μW, respectively. (b) Bunching values 
for auto- and cross-correlation resulting from a theoretical fit to the experimental data shown in the inset (taking into account the timing resolution of the setup). (c) Fraction of two-photon correlations due to twin-photon emission 
calculated from the bunching values in b.
