It is shown that spectrally resolved photon-statistics measurements of the resonance fluorescence from realistic semiconductor quantum-dot systems allow for high contrast identification of the two-photon strong-coupling states. Using a microscopic theory, the second-rung resonance is analyzed and optimum excitation conditions are determined. The computed photon-statistics spectrum displays gigantic, experimentally robust resonances at the energetic positions of the second-rung emission.
@article{arxiv.0801.3604,
title = {Characterization of strong light-matter coupling in semiconductor quantum-dot microcavities via photon-statistics spectroscopy},
author = {L. Schneebeli and M. Kira and S. W. Koch},
journal= {arXiv preprint arXiv:0801.3604},
year = {2008}
}