Photon-Pair Generation in a Heterogeneous Nanophotonic Chip

Mingwei Jin, Neil MacFarlane, Zhaohui Ma, Yong Meng Sua, Mark Foster, Yuping Huang, Amy Foster

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Integrated silicon photonics has played an important role in advancing the applications of quantum information and quantum science. However, it is challenging to integrate all components with state-of-the-art performance using only a homogeneous platform. Here, by combining high nonlinearity and low losses in a heterogeneous silicon platform, we efficiently generate high-quality photon pairs through spontaneous four-wave mixing in a hydrogenated amorphous silicon waveguide and route them off-chip through a low-loss silicon nitride waveguide. A record high coincidence-to-accidental ratio value of 1632.6 (±260.4) is achieved in this heterogeneous design with a photon pair generation rate of 1.94 MHz. We also showcase a wide range of multichannel photon sources with a coincidence-to-accidental ratio consistently around 200. Lastly, we measure heralded single-photons with the lowest gH(2)(0) of 0.1085 ± 0.0014. Our results demonstrate the heterogeneous silicon platform as an ideal platform for the efficient generation of photon pairs and off-chip routing with low losses. It also paves the way for a future hybrid photonic integrated circuit by collecting distinct features from different materials.

Original languageEnglish
Pages (from-to)1962-1968
Number of pages7
JournalACS Photonics
Volume10
Issue number6
DOIs
StatePublished - 21 Jun 2023

Keywords

  • heterogeneous silicon platform
  • hydrogenated amorphous silicon
  • multiple layers
  • photon pair source
  • silicon nitride
  • spontaneous four-wave mixing

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