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Multichannel photon-pair generation using hydrogenated amorphous silicon waveguides.

Ke-Yao Wang, Vesselin G Velev, Kim Fook Lee

|February 25, 2014

Summary

This summary is machine-generated.

We achieved efficient photon-pair generation using hydrogenated amorphous silicon waveguides, showing minimal Raman scattering. This demonstrates a promising platform for scalable quantum technologies utilizing multiplexed signals.

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Area of Science:

Quantum optics
Integrated photonics
Materials science

Background:

Quantum information processing relies on efficient sources of quantum light.
Integrated photonic platforms offer scalability for quantum applications.
Hydrogenated amorphous silicon (a-Si:H) is a CMOS-compatible material with potential for photonic devices.

Purpose of the Study:

To demonstrate efficient photon-pair generation in a-Si:H waveguides.
To assess the suitability of a-Si:H for multiplexed quantum signal generation.
To characterize Raman scattering contamination in a-Si:H waveguides.

Main Methods:

Fabrication of an 8 mm long hydrogenated amorphous silicon waveguide.
Generation and detection of photon pairs across multiple wavelength channels.
Measurement of coincidence-to-accidental ratio (CAR).
Characterization of Raman scattering across a 5 THz spectrum span.

Main Results:

Highly efficient photon-pair generation achieved.
Coincidence-to-accidental ratio (CAR) as high as 400 measured.
Raman scattering found to be insignificant over a 5 THz spectrum span.
Simultaneous operation in multiple wavelength channels demonstrated.

Conclusions:

Hydrogenated amorphous silicon (a-Si:H) is a viable platform for high-performance quantum applications.
The a-Si:H platform supports multiplexed quantum signals with high fidelity.
CMOS compatibility of a-Si:H enables large-scale integration for quantum technologies.