Abstract

Spatially entangled photon states are used in experiments addressing fundamental properties of quantum mechanics as well as practical applications [1]. Thereby, the use of these states demands for time-saving detection mechanisms, capable of measuring coincidences between spatially separated photons with high spatial and temporal resolution. In this work, we demonstrate coincidence detection of spatially correlated photon pairs by means of the SPADnet-I sensor [2], a fully digital 8×16 pixel single photon detector array in CMOS technology developed for medical applications. It enables per-pixel time stamping with 265 ps resolution combined with a high frame rate of 500 kfps [3]. Commonly used optically or electrically amplified CCD based systems exhibit magnitudes lower frame rates and temporal resolution.

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