We investigated third-order correlations between photons born in single quantum dot resonance fluorescence that were filtered with narrow-band tunable etalons. Three-time autocorrelation measurements in which photons were identically filtered resulted in correlation maps that are functions of two relative delays. A comparison with the correlation maps computed using the “sensors method” introduced by del Valle et al. [Phys. Rev. Lett. 109, 183601 (2012)] reveals faithful agreement with theory, with the strongest correlations obtained when filtering between Mollow triplet sidebands and the central peak. We characterized the correlations associated with these virtual transitions and compared them with correlations at other Mollow triplet frequency windows. Accentuated nonclassical characteristics are amongst the distinguishing features of three photon spectra.

• Received 2 July 2018
• Revised 2 October 2018

DOI:https://doi.org/10.1103/PhysRevB.98.165432