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Research at St Andrews

Purcell-enhanced and indistinguishable single-photon generation from quantum dots coupled to on-chip integrated ring resonators

Research output: Contribution to journalArticlepeer-review

Open Access Status

  • Embargoed (until 24/07/21)


Łukasz Dusanowski, Dominik Köck, Eunso Shin, Soon-Hong Kwon, Christian Schneider, Sven Höfling

School/Research organisations


Integrated photonic circuits provide a versatile toolbox of functionalities for advanced quantum optics applications. Here, we demonstrate an essential component of such a system in the form of a Purcell-enhanced single-photon source based on a quantum dot coupled to a robust on-chip integrated resonator. For that, we develop GaAs monolithic ring cavities based on distributed Bragg reflector ridge waveguides. Under resonant excitation conditions, we observe an over 2-fold spontaneous emission rate enhancement using Purcell effect and gain a full coherent optical control of a QD-two-level system via Rabi oscillations. Furthermore, we demonstrate an on-demand single-photon generation with strongly suppressed multiphoton emission probability as low as 1% and two-photon interference with visibility up to 95%. This integrated single-photon source can be readily scaled up, promising a realistic pathway for scalable on-chip linear optical quantum simulation, quantum computation, and quantum networks.


Original languageEnglish
Pages (from-to)6357–6363
Number of pages7
JournalNano Letters
Issue number9
Early online date24 Jul 2020
Publication statusE-pub ahead of print - 24 Jul 2020

    Research areas

  • Quantum dot, Single-photon source, Integrated photonics, Ring resonator, Purcell, Two-photon interference

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