Electrically driven photon antibunching from a single molecule at room temperature. M. Nothaft, S. Höhla, F. Jelezko, N. Frühauf, J. Pflaum and J. Wrachtrup in Nature Comm. 3:628 (2012).

This is a technological result, namely, realizing antibunching from electron-excitation at room temperature. This relies on an organic molecule (namely, a single Ir(piq)${}_3$ (tris(1-phenylisoquinoline)iridium) molecule) embedded in a matrix. No new physics as compared to similar papers.

The level scheme is the standard 3LS, with singlet/triplet and conduction bands:

They find a single exponential $g^{(2)}(\tau)$ (plotted here in log-linear scales, hence the shape):

It is remarkable how the curve can be "transformed" from its raw version where $g^{(2)}>0.95$ to the corrected one where it is $\approx0.3$. One would also observe how the axis confusingly starts at 0.2 in the second case. There are more results in the axes than in the actual curve.

Note that the noise is stronger at the inflection point, with unclear reason why.