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Purcell-Enhanced and Indistinguishable Single-Photon Generation from Quantum Dots Coupled to On-Chip Integrated Ring
Łukasz Dusanowski1, Dominik Köck1, Eunso Shin2
1Technische Physik and Würzburg-Dresden Cluster of Excellence ct.qmat, Physikalisches Institut and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
Nano Letters
|July 25, 2020
Summary
Researchers developed a Purcell-enhanced single-photon source using integrated photonic circuits and quantum dots. This on-chip system achieves efficient, on-demand single-photon generation for quantum technologies.
Area of Science:
- Quantum optics and integrated photonics
- Solid-state quantum emitters
Background:
- Integrated photonic circuits are crucial for advanced quantum optics.
- On-chip single-photon sources are essential for scalable quantum technologies.
Purpose of the Study:
- To demonstrate a Purcell-enhanced single-photon source integrated onto a chip.
- To achieve coherent optical control and on-demand single-photon generation.
Main Methods:
- Fabrication of GaAs monolithic ring cavities using distributed Bragg reflector ridge waveguides.
- Coupling quantum dots to on-chip integrated resonators.
- Resonant excitation and observation of Rabi oscillations.
Main Results:
- Over 2-fold spontaneous emission rate enhancement via the Purcell effect.
- Coherent optical control of a quantum dot (QD) two-level system.
- On-demand single-photon generation with <1% multiphoton probability and 95% two-photon interference visibility.
Conclusions:
- Demonstrated a robust, integrated single-photon source with enhanced performance.
- The developed source is scalable for on-chip quantum simulation, computation, and networks.
