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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A chip-scale, telecommunications-band frequency conversion interface for quantum emitters.

Imad Agha, Serkan Ates, Marcelo Davanço

|October 10, 2013

Summary

This summary is machine-generated.

This study presents a chip-scale frequency conversion interface using silicon nitride waveguides. It enables efficient wavelength conversion for quantum emitters, enhancing their integration with telecommunication systems.

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Area of Science:

Quantum optics and photonics
Integrated photonics
Materials science (silicon nitride)

Background:

Single photon emitters often operate at wavelengths not directly compatible with telecommunication bands.
Efficient frequency conversion is crucial for integrating quantum emitters with existing fiber optic infrastructure.
Low-noise operation is essential for preserving quantum information during frequency conversion.

Purpose of the Study:

To develop a chip-scale frequency conversion interface for quantum applications.
To demonstrate low-noise upconversion and downconversion between 980 nm and 1550 nm.
To design waveguides for connecting shorter wavelength quantum emitters to the 1550 nm telecommunication band.

Main Methods:

Utilized four-wave-mixing Bragg scattering in silicon nitride waveguides.
Employed finite element simulations and the split-step Fourier method for analysis.
Investigated continuous wave (CW) and pulsed pump power regimes.

Main Results:

Achieved frequency upconversion and downconversion between 980 nm and 1550 nm.
Demonstrated signal-to-background levels greater than 10 and conversion efficiency of approximately -60 dB at low CW pump powers (< 50 mW).
Simulations predict > 25% conversion efficiency at higher pulsed pump powers (≈ 10 W).

Conclusions:

The developed silicon nitride waveguide interface offers a viable solution for low-noise frequency conversion.
The technology facilitates the integration of various quantum emitters with the 1550 nm telecommunication band.
Future work can leverage higher pump powers for significantly improved conversion efficiency.