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

Nonlinear Optics

Integrated Spatial Multiplexing of Photonic Crystal Waveguide Heralded Single-Photon Sources

Matthew J. Collins, Chunle Xiong, Isabella H. Rey, Trung D. Vo, Jiakun He, Shayan Shahnia, Chris Reardon, Michael J. Steel, Thomas F. Krauss, Alex S. Clark, Benjamin J. Eggleton

Published Jan 1, 2013• 0 citations
Publisher

Abstract

We experimentally demonstrate spatial multiplexing of monolithic heralded single photon sources based on slow-light enhanced spontaneous four-wave mixing. We use a low-loss integrated electro-optic switch to achieve a net gain in the heralded single-photon rate.
DOI
10.1364/nlo.2013.nw1a.5

Related papers

Spatial multiplexing of monolithic Silicon heralded single photon sources

Matthew J. Collins, Chunle Xiong, Trung D. Vo +8 more

Here we present the first experimental demonstration of spatial multiplexing of two integrated heralded single photon sources so as to enhance the heralded photon rate for a given single waveguide output power.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2013•1 citation

Bidirectional multiplexing of heralded single photons from a silicon chip

Chunle Xiong, Trung D. Vo, Matthew J. Collins +5 more

We demonstrate integrated spatial multiplexing of heralded single photons generated from a single 96 μm long silicon photonic crystal waveguide in a bidirectional pump configuration. By using a low-loss fiber-coupled opto-ceramic switch, the multiplexing technique enhances the brightness of the single photon source by 51.2±4.0% while maintaining the coincidence-to-accidental ratio. Compared with the demonstration of multiplexing two individual sources, the bidirectional pump scheme represents a twofold reduction in the footprint of nonlinear devices for future large-scale integration of on-chip single photon sources. The 51.2±4.0% gain will make any quantum operation requiring n photons 1.5(n) times faster.

Optics Letters•Nov 25, 2013•35 citations

Integrated spatial multiplexing of heralded single-photon sources

Matthew J. Collins, Chunle Xiong, Isabella H. Rey +8 more

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 heralded 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 interference, required at the core of optical quantum computing and quantum communication protocols. Photonic quantum technologies will require efficient single-photon sources and spatial multiplexing has been explored as a route to achieve this. Here, the authors present a scheme to integrate several single-photon sources using spatial multiplexing for on-chip applications at telecommunications wavelengths.

arXiv:1305.7278•Nature Communications•Oct 10, 2013•297 citations

Six-photon experiments using an on-chip array of heralded, pure single photon sources

Justin B. Spring, Paolo L. Mennea, Benjamin J. Metcalf +8 more

Heralded single photon sources, based on probabilistic non-linear interactions, currently serve as the de-facto standard for performing multi-photon quantum interference experiments. Already, interesting phenomena may be explored with a handful of such sources [1], whilst in the future, large arrays of identical sources could be multiplexed with a switching network to achieve a truly scalable, near-deterministic emission [2]. However, fabricating such a large number of indistinguishable, pure, heralded single photon sources, operating with low-loss, remains an open challenge. Spontaneous four-wave mixing (SFWM) in a silica waveguide is a promising route to building such a source. The low-loss and excellent mode-matching to optical fibre of silica waveguides allows high preparation efficiency. Guided-wave photonics also allows the precise control of the optical modes needed to engineer emission of photons into a single pair of Schmidt modes: allowing heralded photons of high purity without narrowband filtering [3].

European Quantum Electronics Conference (EQEC)•Jun 21, 2015•0 citations

Bi-directional Multiplexing of Heralded Single Photon Sources from a Single Silicon Photonic Chip

Chi Xiong, Trung D. Vo, Matthew J. Collins +5 more

We demonstrate spatial multiplexing of two heralded single photon sources created by bi-directionally pumping a single 96 μm photonic crystal waveguide. This enhances the source brightness by 51.2±4.0% whilst maintaining the coincidence to accidental ratio.

•Jan 1, 2014•0 citations

Heralded single photons from silicon coupled-resonator optical waveguides

Jun Rong Ong, Marcelo Davanço, Andrea Bahgat Shehata +7 more

We leverage the high spontaneous four-wave-mixing nonlinearity (γ≈4150/W·m) of silicon coupled-resonator optical waveguides to demonstrate a telecommunications-band, heralded single photon source. The generated light is antibunched with g(2)(0) ≈ 0.19 ±0.03 at low power.

IEEE International Conference on Group IV Photonics (GFP)•Aug 1, 2012•0 citations
We demonstrate integrated spatial multiplexing of heralded single photons generated from a single 96 μm long silicon photonic crystal waveguide in a bidirectional pump configuration. By using a low-loss fiber-coupled opto-ceramic switch, the multiplexing technique enhances the brightness of the single photon source by 51.2±4.0% while maintaining the coincidence-to-accidental ratio. Compared with the demonstration of multiplexing two individual sources, the bidirectional pump scheme represents a twofold reduction in the footprint of nonlinear devices for future large-scale integration of on-chip single photon sources. The 51.2±4.0% gain will make any quantum operation requiring n photons 1.5(n) times faster.
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 heralded 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 interference, required at the core of optical quantum computing and quantum communication protocols. Photonic quantum technologies will require efficient single-photon sources and spatial multiplexing has been explored as a route to achieve this. Here, the authors present a scheme to integrate several single-photon sources using spatial multiplexing for on-chip applications at telecommunications wavelengths.
Heralded single photon sources, based on probabilistic non-linear interactions, currently serve as the de-facto standard for performing multi-photon quantum interference experiments. Already, interesting phenomena may be explored with a handful of such sources [1], whilst in the future, large arrays of identical sources could be multiplexed with a switching network to achieve a truly scalable, near-deterministic emission [2]. However, fabricating such a large number of indistinguishable, pure, heralded single photon sources, operating with low-loss, remains an open challenge. Spontaneous four-wave mixing (SFWM) in a silica waveguide is a promising route to building such a source. The low-loss and excellent mode-matching to optical fibre of silica waveguides allows high preparation efficiency. Guided-wave photonics also allows the precise control of the optical modes needed to engineer emission of photons into a single pair of Schmidt modes: allowing heralded photons of high purity without narrowband filtering [3].