title: Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering.
abstract: We calculate that an appropriate modification of the field associated with only one of the photons of a photon pair can suppress generation of the pair entirely. From this general result, we develop a method for suppressing the generation of undesired photon pairs utilizing photonic stop bands. For a third-order nonlinear optical source of frequency-degenerate photons, we calculate the modified frequency spectrum (joint spectral intensity) and show a significant increase in a standard metric, the coincidence to accidental ratio. These results open a new avenue for photon-pair frequency correlation engineering.
authors.affiliation: Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), MQ Photonics Research Centre, QSciTech Research Centre, Department of Physics and Astronomy, Macquarie University, New South Wales 2109, Australia.
authors.forename: L G
authors.initials: LG
authors.lastname: Helt
authors.affiliation: Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2L 2Y5, Canada.
authors.forename: Agata M
authors.initials: AM
authors.lastname: Brańczyk
authors.affiliation: Dipartimento di Fisica, Università delgi Studi di Pavia, via Bassi 6, Pavia, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Liscidini
authors.affiliation: Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), MQ Photonics Research Centre, QSciTech Research Centre, Department of Physics and Astronomy, Macquarie University, New South Wales 2109, Australia.
authors.forename: M J
authors.initials: MJ
authors.lastname: Steel