APL Photonics (Oct 2018)

Quantum photonic integrated circuits based on tunable dots and tunable cavities

  • M. Petruzzella,
  • S. Birindelli,
  • F. M. Pagliano,
  • D. Pellegrino,
  • Ž. Zobenica,
  • L. H. Li,
  • E. H. Linfield,
  • A. Fiore

DOI
https://doi.org/10.1063/1.5039961
Journal volume & issue
Vol. 3, no. 10
pp. 106103 – 106103-14

Abstract

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Quantum photonic integrated circuits hold great potential as a novel class of semiconductor technologies that exploit the evolution of a quantum state of light to manipulate information. Quantum dots encapsulated in photonic crystal structures are promising single-photon sources that can be integrated within these circuits. However, the unavoidable energy mismatch between distant cavities and dots, along with the difficulties in coupling to a waveguide network, has hampered the implementation of circuits manipulating single photons simultaneously generated by remote sources. Here we present a waveguide architecture that combines electromechanical actuation and Stark-tuning to reconfigure the state of distinct cavity-emitter nodes on a chip. The Purcell-enhancement from an electrically controlled exciton coupled to a ridge waveguide is reported. Besides, using this platform, we implement an integrated Hanbury-Twiss and Brown experiment with a source and a splitter on the same chip. These results open new avenues to scale the number of indistinguishable single photons produced on-demand by distinct emitters.