3D quantum ghost imaging

Abstract

We present current results of a novel, to the best of our knowledge, type of setup for quantum ghost imaging based on asynchronous single photon timing using single photon avalanche diode (SPAD) detectors, first presented in [ Appl. Opt. 60 , F66 ( 2021 ) APOPAI 0003-6935 10.1364/AO.423634 ]. The scheme enables photon pairing without fixed delays and, thus, overcomes some limitations of the widely used heralded setups for quantum ghost imaging [ Nat. Commun. 6 , 5913 ( 2015 ) NCAOBW 2041-1723 10.1038/ncomms6913 ]. It especially allows three-dimensional (3D) imaging by direct time of flight methods, the first demonstration of which will be shown here. To our knowledge, it is also the first demonstration of 3D quantum ghost imaging at all.