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Updated: Oct 17, 2025
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Integrated Whispering-Gallery-Mode Resonator for Solid-State Coherent Quantum Photonics.
Arianne Brooks1, Xiao-Liu Chu1, Zhe Liu1
1Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
Nano Letters
|October 12, 2021
Summary
Integrated microdisk cavities with quantum dots enable coherent photon routing. This breakthrough allows for efficient control in quantum devices by manipulating light-matter interactions at the single-photon level.
Area of Science:
- Quantum optics
- Nanophotonics
- Solid-state physics
Background:
- Tailored photonics cavities are crucial for enhancing light-matter interactions.
- Achieving a fully coherent quantum interface is a key goal in quantum information science.
Purpose of the Study:
- To report an integrated microdisk cavity with self-assembled quantum dots for coherent photon routing.
- To demonstrate control over photon routing through quantum dot-resonator detuning and excitation strength.
Main Methods:
- Fabrication of an integrated microdisk cavity containing self-assembled quantum dots.
- Measurement of Purcell factor and observation of coherent scattering.
- Characterization of photon routing between drop and bus ports.
Main Results:
- A Purcell factor of F_exp = 6.9 ± 0.9 was measured for a cavity with Q ≈ 10,000.
- Clear signatures of coherent photon scattering by quantum dots were observed.
- Coherent rerouting of photons between ports was demonstrated, controlled by detuning and excitation intensity.
Conclusions:
- The integrated system enables coherent photon routing, essential for quantum interfaces.
- Coherent scattering and single-photon nonlinearity offer pathways to enhance quantum device efficiency.
- This approach has potential applications in quantum routers and Bell-state analyzers.
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