TY - JOUR
T1 - Photon-Pair Generation in a Heterogeneous Nanophotonic Chip
AU - Jin, Mingwei
AU - MacFarlane, Neil
AU - Ma, Zhaohui
AU - Sua, Yong Meng
AU - Foster, Mark
AU - Huang, Yuping
AU - Foster, Amy
N1 - Publisher Copyright:
© 2023 American Chemical Society
PY - 2023/6/21
Y1 - 2023/6/21
N2 - 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.
AB - 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.
KW - heterogeneous silicon platform
KW - hydrogenated amorphous silicon
KW - multiple layers
KW - photon pair source
KW - silicon nitride
KW - spontaneous four-wave mixing
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U2 - 10.1021/acsphotonics.3c00394
DO - 10.1021/acsphotonics.3c00394
M3 - Article
AN - SCOPUS:85163306180
VL - 10
SP - 1962
EP - 1968
JO - ACS Photonics
JF - ACS Photonics
IS - 6
ER -