PT Journal
AU Collins, MJ
   Xiong, C
   Rey, IH
   Vo, TD
   He, J
   Shahnia, S
   Reardon, C
   Krauss, TF
   Steel, MJ
   Clark, MJ
   &  Eggleton, BJ
TI Integrated spatial multiplexing of heralded single-photon sources
SO Nature Communications
PY 2013
DI 10.1038/ncomms3582
LA English
AB The non-deterministic nature of photon sources is a key limitation for single-photon quantum processors. Spatial multiplexing overcomes this by enhancing the heralded single-photon yield without enhancing the output noise. Here the intrinsic statistical limit of an individual source is surpassed by spatially multiplexing two monolithic silicon-based correlated photon pair sources in the telecommunications band, demonstrating a 62.4% increase in the her- alded single-photon output without an increase in unwanted multipair generation. We further demonstrate the scalability of this scheme by multiplexing photons generated in two waveguides pumped via an integrated coupler with a 63.1% increase in the heralded photon rate. This demonstration paves the way for a scalable architecture for multiplexing many photon sources in a compact integrated platform and achieving efficient two-photon inter- ference, required at the core of optical quantum computing and quantum communication protocols.
ER