title: Coincidence detection of spatially correlated photon pairs with a monolithic time-resolving detector array.
abstract: We demonstrate coincidence measurements of spatially entangled photons by means of a multi-pixel based detection array. The sensor, originally developed for positron emission tomography applications, is a fully digital 8×16 silicon photomultiplier array allowing not only photon counting but also per-pixel time stamping of the arrived photons with an effective resolution of 265 ps. Together with a frame rate of 500 kfps, this property exceeds the capabilities of conventional charge-coupled device cameras which have become of growing interest for the detection of transversely correlated photon pairs. The sensor is used to measure a second-order correlation function for various non-collinear configurations of entangled photons generated by spontaneous parametric down-conversion. The experimental results are compared to theory.
authors.forename: Manuel
authors.initials: M
authors.lastname: Unternährer
authors.forename: Bänz
authors.initials: B
authors.lastname: Bessire
authors.forename: Leonardo
authors.initials: L
authors.lastname: Gasparini
authors.forename: David
authors.initials: D
authors.lastname: Stoppa
authors.forename: André
authors.initials: A
authors.lastname: Stefanov