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Ultra-low loss quantum photonic circuits integrated with single quantum emitters
Ashish Chanana1,2,3, Hugo Larocque4, Renan Moreira5
1Microsystems and Nanotechnology Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA.
Nature Communications
|December 12, 2022
Summary
Researchers integrated quantum light sources with ultra-low loss photonic circuits. This breakthrough enables efficient on-chip photon flux, crucial for scaling quantum information processing systems.
Area of Science:
- Quantum Information Science
- Integrated Photonics
- Quantum Optics
Background:
- Scaling quantum information processing systems is limited by on-chip photon flux.
- Ultra-low loss photonic circuits and high-brightness single-photon sources have advanced separately.
- Integrating these technologies has been a significant challenge.
Purpose of the Study:
- To integrate a quantum emitter single-photon source with a wafer-scale, ultra-low loss silicon nitride photonic circuit.
- To demonstrate efficient single-photon delivery within an integrated photonic system.
- To explore potential for coherent control of quantum emitters.
Main Methods:
- Fabrication of wafer-scale silicon nitride photonic circuits with ultra-low loss.
- Integration of a quantum emitter single-photon source with the photonic circuit.
- Characterization of single-photon emission and propagation loss at telecom-relevant wavelengths.
Main Results:
- Demonstrated triggered and pure single-photon emission into a silicon nitride (Si3N4) photonic circuit.
- Achieved ultra-low propagation loss of approximately 1 dB/m at ~930 nm wavelength.
- Observed resonance fluorescence in the strong drive regime, indicating potential for coherent control.
Conclusions:
- Successful integration of quantum emitters with ultra-low loss photonic circuits.
- Significant advancement towards scalable chip-integrated photonic quantum information systems.
- Paves the way for critical functionalities like storing and buffering of single photons.
