We review some recent experiments based upon multimode two-photon interference of photon pairs created by spontaneous parametric down-conversion. The new element provided by these experiments is the inclusion of the transverse spatial profiles of the pump, signal and idler fields. We discuss multimode Hong-Ou-Mandel interference, and show that the transverse profile of the pump beam can be manipulated in order to control two-photon interference. We present the basic theory and experimental results as well as several applications to the field of quantum information.
@article{arxiv.quant-ph/0412022,
title = {Multimode Hong-Ou-Mandel Interferometry},
author = {S. P. Walborn and W. A. T. Nogueira and A. N. de Oliveira and S. Pádua and C. H. Monken},
journal= {arXiv preprint arXiv:quant-ph/0412022},
year = {2009}
}
Comments
20 pages, 14 figures, Brief Review to be published in Modern Physics Letters B