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Integration of GaAs waveguides on a silicon substrate for quantum photonic circuits

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  • Atefeh Shadmani, University of Copenhagen
  • ,
  • Rodrigo A. Thomas, University of Copenhagen
  • ,
  • Zhe Liu, University of Copenhagen
  • ,
  • Camille Papon, University of Copenhagen
  • ,
  • Martijn J.R. Heck
  • Nicolas Volet
  • Sven Scholz, Ruhr University Bochum
  • ,
  • Andreas D. Wieck, Ruhr University Bochum
  • ,
  • Arne Ludwig, Ruhr University Bochum
  • ,
  • Peter Lodahl, University of Copenhagen
  • ,
  • Leonardo Midolo, University of Copenhagen

We report a method for integrating GaAs waveguide circuits containing self-assembled quantum dots on a Si/SiO2 wafer, using die-to-wafer bonding. The large refractive-index contrast between GaAs and SiO2 enables fabricating single-mode waveguides without compromising the photon-emitter coupling. Anti-bunched emission from individual quantum dots is observed, along with a waveguide propagation loss <7 dB/mm, which is comparable with the performance of suspended GaAs circuits. These results enable the integration of quantum emitters with different material platforms, towards the realization of scalable quantum photonic integrated circuits.

Original languageEnglish
JournalOptics Express
Pages (from-to)37595-37602
Number of pages8
Publication statusPublished - Oct 2022

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