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-μm-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.
@article{arxiv.1401.7470,
title = {Entangled photons from on-chip slow light},
author = {Hiroki Takesue and Nobuyuki Matsuda and Eiichi Kuramochi and Masaya Notomi},
journal= {arXiv preprint arXiv:1401.7470},
year = {2014}
}