We measure the dynamics of a non-classical optical field using two-time second-order correlations in conjunction with pulsed excitation. The technique quantifies single-photon purity and coherence during the excitation-decay cycle of an emitter, illustrated here using a quantum dot. We observe that for certain pump wavelengths, photons detected early in the cycle have reduced single-photon purity and coherence compared to those detected later. A model indicates that the single-photon purity dynamics are due to exciton recapture after initial emission and within the same pulse cycle.
@article{arxiv.1209.3652,
title = {Dynamics of the non-classical light from a single solid-state quantum emitter},
author = {Edward B. Flagg and Sergey V. Polyakov and Tim Thomay and Glenn S. Solomon},
journal= {arXiv preprint arXiv:1209.3652},
year = {2015}
}
Comments
5 pages. Accepted for publication in PRL, http://prl.aps.org