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Integrated spatial multiplexing of heralded single-photon sources
M J Collins1, C Xiong, I H Rey
1Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia.
Nature Communications
|October 11, 2013
Summary
Spatial multiplexing enhances heralded single-photon yield by combining multiple silicon-based photon sources. This technique boosts single-photon output for quantum processors without increasing noise.
Area of Science:
- Quantum optics and photonics
- Integrated photonics
- Quantum information science
Background:
- Non-deterministic photon sources limit single-photon quantum processors.
- Spatial multiplexing can increase heralded single-photon yield without adding noise.
Purpose of the Study:
- To overcome the statistical limits of individual photon sources.
- To demonstrate a scalable method for enhancing heralded single-photon generation.
Main Methods:
- Spatially multiplexing two monolithic silicon-based correlated photon pair sources operating in the telecommunications band.
- Multiplexing photons from two waveguides pumped via an integrated coupler.
Main Results:
- Achieved a 62.4% increase in heralded single-photon output from two sources without increased multipair generation.
- Demonstrated a 63.1% increase in heralded photon rate using an integrated waveguide scheme, showing scalability.
Conclusions:
- Spatial multiplexing of silicon-based photon sources offers a scalable architecture for quantum technologies.
- This approach enables efficient two-photon interference crucial for optical quantum computing and communication.
