We propose to pump semiconductor quantum dots with surface acoustic waves which deliver an alternating periodic sequence of electrons and holes. In combination with a good optical cavity such regular pumping could entail anti-bunching and sub-Poissonian photon statistics. In the bad-cavity limit a train of equally spaced photons would arise.
@article{arxiv.quant-ph/9803061,
title = {Photon trains and lasing : The periodically pumped quantum dot},
author = {C. Wiele and F. Haake and C. Rocke and A. Wixforth},
journal= {arXiv preprint arXiv:quant-ph/9803061},
year = {2009}
}