title: Capacitive readout and gating of superconducting single photon detectors.
abstract: We propose and develop a readout scheme for superconducting single-photon detectors based on an integrated circuit, relaxing the need for large bandwidth amplification and resulting in voltage steps proportional to the number of detected photons. We also demonstrate time gating, to filter scattered light in time and reduce dark counts. This could lead to a higher signal-to-noise ratio. The gate pulse is generated on the detection of a photon created by a spontaneous parametric down-conversion source, heralding the presence of a second photon. These two schemes could find applications within advanced multi-array imaging detection systems.
authors.affiliation: Physics Department, Stockholm University, SE 106 91 Stockholm, Sweden.
authors.forename: Hatim
authors.initials: H
authors.lastname: Azzouz
authors.forename: Reinier W
authors.initials: RW
authors.lastname: Heeres
authors.forename: Sander N
authors.initials: SN
authors.lastname: Dorenbos
authors.forename: Raymond N
authors.initials: RN
authors.lastname: Schouten
authors.forename: Valery
authors.initials: V
authors.lastname: Zwiller