Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Silicon Waveguide-based Single Photon Source with 12.4% High Off-chip Measured Heralding Efficiency

Jinyi Du, George F. R. Chen, Hongwei Gao, Dawn T. H. Tan, James A. Grieve, Alexander Ling

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We designed and fabricated a silicon chip-based heralded single-photon source with 12.4% off-chip measured heralding efficiency. In addition, we achieve a coincidence-to-accidental ratio of 443.7 and heralded self-correlation function of 0.0037 measured at a pair rate of 313kHz. This demonstration of low noise and few multi-photon events at high pair rate is important for practical applications in quantum communication.

DOI
10.1364/fio.2023.jw4a.13

Related papers

Are on-chip heralded single photon sources possible by intermodal four wave mixing in silicon waveguides?

Stefano Signorini, Sara Piccione, Mher Ghulinyan +2 more

On-chip heralded single photon sources are of key importance in the development of chip-scale devices exploiting the quantum properties of light. Single photon states can be produced as single photons heralded from correlated photon pairs generated through spontaneous four wave mixing. On-chip heralded single photon sources based on spontaneous four wave mixing have been already demonstrated. However, the heralded and herald photons are usually generated with wavelengths very close to the pump one, limiting the pump rejection efficiency and the application to the mid infrared. Moreover, the common sources of heralded photons based on spontaneous four wave mixing require spectral post filtering to achieve high purity, limiting the brightness and the integration of these sources. A solution to these problems can be provided by intermodal four wave mixing. In this work, we demonstrate the generation of photon pairs through intermodal four wave mixing in silicon waveguides, measuring the coincidences between the idler at 1.281 μm and the signal at 1.952 μm. We then discuss the application of intermodal four wave mixing to on-chip heralded single photon sources.

Quantum Photonic Devices•Sep 11, 2018•4 citations

Photon-pair generation in a heterogeneous silicon photonic chip

Jin, Mingwei, Neil MacFarlane, Zhaohui Ma +4 more

Integrated Silicon photonics has played an important role in advancing the applications of quantum information and quantum science. However, due to different material properties, it is challenging to integrate all components with excellent performance based on homogeneous material. 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 hydrogenated amorphous silicon waveguide and route them off-chip through low loss silicon nitride waveguide. A record high coincidence- to- accidental rate value of 1632.6 ($\pm$ 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 multi-channel photon sources with coincidence- to- accidental rate consistently at 200. Lastly, we measure heralded single-photons with a lowest $g^{(2)}_H(0)$ of 0.1085 $\pm$ 0.0014. Our results demonstrate the heterogeneous silicon platform as an ideal platform for efficient generation of photon pairs and routing them off-chip with low losses. It also paves a way for the future hybrid photonic integrated circuit by collecting distinct features from different materials.

arXiv:2208.13955•Aug 30, 2022•0 citations

High coincidence-to-accidental ratio continuous-wave photon-pair generation in a grating-coupled silicon strip waveguide

Kai Guo, Erik Nicolai Christensen, Jesper B. Christensen +5 more

We demonstrate a very high coincidence-to-accidental ratio of 673 using continuous-wave photon-pair generation in a silicon strip waveguide through spontaneous four-wave mixing. This result is obtained by employing on-chip photonic-crystal-based grating couplers for both low-loss fiber-to-chip coupling and on-chip suppression of generated spontaneous Raman scattering noise. We measure a minimum heralded second-order correlation of , demonstrating that our source operates in the single-photon regime with low noise.

Applied Physics Express•May 25, 2017•43 citations

High-quality silicon single-photon source for practical quantum network

Jinyi Du, George F. R. Chen, Hongwei Gao +3 more

A high-quality heralded single photon source is realized on silicon-on-insulator (SOI) platform. With the help of specially designed ultra-low loss fiber-chip edge couplers, the heralding efficiency of the single photon source system is 56%, after calibrating for a 38% detector efficiency. Compared with the state of the art, this measured heralding efficiency marks a new milestone for integrated, on-chip silicon sources.

SPIE Silicon Photonics•Mar 12, 2024•1 citation

Photon-Pair Generation in a Heterogeneous Nanophotonic Chip

Mingwei Jin, Neil MacFarlane, Zhaohui Ma +4 more

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 g H (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.

ACS Photonics•Jun 2, 2023•7 citations

Heralded single photons from a silicon nanophotonic chip

Jun Rong Ong, Marcelo Davanço, Andrea Bahgat Shehata +8 more

A highly nonlinear (γ≈3700/W·m) silicon coupled-resonator-optical-waveguide generated heralded single photons (g(2)(0) ≤ 0.19 ±0.03) and widely-spaced photon pairs with coincidences-to-accidentals ratio >10 (cw) and >23 (pulsed), and outperformed a 54x longer silicon nanophotonic waveguide.

Conference on Lasers and Electro-Optics•Jan 1, 2012•1 citation
We designed and fabricated a silicon chip-based heralded single-photon source with 12.4% off-chip measured heralding efficiency. In addition, we achieve a coincidence-to-accidental ratio of 443.7 and heralded self-correlation function of 0.0037 measured at a pair rate of 313kHz. This demonstration of low noise and few multi-photon events at high pair rate is important for practical applications in quantum communication.
On-chip heralded single photon sources are of key importance in the development of chip-scale devices exploiting the quantum properties of light. Single photon states can be produced as single photons heralded from correlated photon pairs generated through spontaneous four wave mixing. On-chip heralded single photon sources based on spontaneous four wave mixing have been already demonstrated. However, the heralded and herald photons are usually generated with wavelengths very close to the pump one, limiting the pump rejection efficiency and the application to the mid infrared. Moreover, the common sources of heralded photons based on spontaneous four wave mixing require spectral post filtering to achieve high purity, limiting the brightness and the integration of these sources. A solution to these problems can be provided by intermodal four wave mixing. In this work, we demonstrate the generation of photon pairs through intermodal four wave mixing in silicon waveguides, measuring the coincidences between the idler at 1.281 μm and the signal at 1.952 μm. We then discuss the application of intermodal four wave mixing to on-chip heralded single photon sources.
Integrated Silicon photonics has played an important role in advancing the applications of quantum information and quantum science. However, due to different material properties, it is challenging to integrate all components with excellent performance based on homogeneous material. 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 hydrogenated amorphous silicon waveguide and route them off-chip through low loss silicon nitride waveguide. A record high coincidence- to- accidental rate value of 1632.6 (±\pm± 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 multi-channel photon sources with coincidence- to- accidental rate consistently at 200. Lastly, we measure heralded single-photons with a lowest gH(2)(0)g^{(2)}_H(0)gH(2)​(0) of 0.1085 ±\pm± 0.0014. Our results demonstrate the heterogeneous silicon platform as an ideal platform for efficient generation of photon pairs and routing them off-chip with low losses. It also paves a way for the future hybrid photonic integrated circuit by collecting distinct features from different materials.
We demonstrate a very high coincidence-to-accidental ratio of 673 using continuous-wave photon-pair generation in a silicon strip waveguide through spontaneous four-wave mixing. This result is obtained by employing on-chip photonic-crystal-based grating couplers for both low-loss fiber-to-chip coupling and on-chip suppression of generated spontaneous Raman scattering noise. We measure a minimum heralded second-order correlation of , demonstrating that our source operates in the single-photon regime with low noise.
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 g H (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.