We apply the Stimulated Emission Tomography (SET) technique to assess the ability of plasmonic nanoantennas to generate correlated photon pairs via spontaneous four-wave mixing (SFWM). In line with SET theory, we characterize the SFWM pair generation rate by studying the case of stimulated four-wave mixing (FWM). By calculating the number of stimulating and generated photons along with the frequency mixing efficiency, we estimate the SFWM pair generation rate. We also produce a map of the joint spectral density (JSD) to characterize the bi-photon state with greater resolution than that of spectrally resolved coincidence measurements.
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