Near-unity indistinguishability single photon source for large-scale integrated quantum optics

Łukasz Dusanowski, Soon-Hong Kwon, Christian Schneider, Sven Höfling

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)
1 Downloads (Pure)


Integrated single photon sources are key building blocks for realizing scalable devices for quantum information processing. For such applications highly coherent and indistinguishable single photons on a chip are required. Here we report on a triggered resonance fluorescence single photon source based on In(Ga)As/GaAs quantum dots coupled to single- and multimode ridge waveguides. We demonstrate the generation of highly linearly polarized resonance fluorescence photons with 99.1% (96.0%) single photon purity and 97.5% (95.0%) indistinguishability in case of multimode (single mode) waveguide devices fulfilling the strict requirements imposed by multi-interferometric quantum optics applications. Our integrated triggered single photon source can be readily scaled up, promising a realistic pathway for on-chip linear optical quantum simulation, quantum computation, and quantum networks.
Original languageEnglish
Article number173602
Number of pages6
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 3 May 2019


  • Single photon source
  • Integrated photonics
  • Quantum dot
  • Waveguides
  • Resonance fluorescence
  • Two-photon interference


Dive into the research topics of 'Near-unity indistinguishability single photon source for large-scale integrated quantum optics'. Together they form a unique fingerprint.

Cite this