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Quantum-correlated photon pair generation in chalcogenide As2S3 waveguides.
1Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Institute for Photonics and Optical Science (IPOS), School of Physics, University of Sydney, Australia. chunle@physics.usyd.edu.au
Optics Express
|August 20, 2010
Summary
We theoretically demonstrate high-brightness, correlated photon pairs from chalcogenide waveguides using spontaneous four-wave mixing. This integrated photonic chip technology shows potential for on-chip quantum applications.
Area of Science:
- Quantum optics
- Materials science
- Photonics
Background:
- Spontaneous four-wave mixing (SFWM) is a key process for generating quantum-correlated photon pairs.
- Chalcogenide materials offer unique nonlinear optical properties for photonic integration.
- On-chip quantum technologies require efficient and high-quality photon-pair sources.
Purpose of the Study:
- To theoretically investigate the generation of quantum-correlated photon pairs in As(2)S(3) waveguides.
- To assess the brightness and correlation of photon pairs produced via SFWM.
- To explore the feasibility of integrated photonic platforms for quantum technologies.
Main Methods:
- Theoretical modeling of spontaneous four-wave mixing in As(2)S(3) waveguides.
- Analysis of photon-pair generation rates and spectral correlations.
- Consideration of waveguide dispersion engineering and Raman scattering effects.
Main Results:
- High brightness (approx. 1 x 10(9) pairs/s) and high correlation (approx. 100) are achievable with optimized waveguide parameters.
- A low gain window in the Raman scattering profile at 7.4 THz Stokes shift enables high correlation.
- Multi-pair generation poses a constraint on achievable correlation.
Conclusions:
- Chalcogenide As(2)S(3) waveguides are promising for on-chip quantum-correlated photon-pair generation.
- The proposed scheme leverages photonic chip technology for scalable quantum applications.
- Further optimization can enhance performance for integrated quantum information processing.
