Entangled photons from on-chip slow light

  • Takesue H
  • Matsuda N
  • Kuramochi E
 et al. 
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Abstract

We report the first entanglement generation experiment using an on-chip slow light device. With highly efficient spontaneous four-wave mixing enhanced by the slow light effect in a coupled resonator optical waveguide based on a silicon photonic crystal, we generated 1.5-$\mu$m-band high-dimensional time-bin entangled photon pairs. We undertook two-photon interference experiments and observed the coincidence fringes with visibilities $>74\%$. The present result enables us to realize an on-chip entanglement source with a very small footprint, which is an essential function for quantum information processing based on integrated quantum photonics.

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Authors

  • Hiroki Takesue

  • Nobuyuki Matsuda

  • Eiichi Kuramochi

  • Masaya Notomi

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