Single-photon wave-packet engineering using nonlinear optical downconversion
Michael G. Raymer, Jaewoo Noh, Ian A. Walmsley, Konrad Banaszek · Frontiers in Optics · 2003
Pulsed spontaneous down conversion can be controlled by modifying the density of states of vacuum modes using cavity structures containing distributed Bragg gratings. It seems feasible to engineer the vacuum to create single-photon pairs in well defined coherent (pure-state) wave packets, thereby precluding the need for post-filtering.