Interference of a single photon generated from a single quantum dot is observed between two photon polarization modes. Each emitted single photon has two orthogonal polarization modes associated with the solid-state single photon source, in which two non-degenerate neutral exciton states are involved. The interference between the two modes takes place only under the condition that the emitted photon is free from which-mode information.
@article{arxiv.0908.1829,
title = {Single photon interference between two modes originated from a single quantum dot},
author = {H. Kumano and S. Ekuni and H. Nakajima and M. Jo and H. Sasakura and S. Adachi and S. Muto and I. Suemune},
journal= {arXiv preprint arXiv:0908.1829},
year = {2009}
}