1304.0642 (Laurent Olislager et al.)

Silicon-on-insulator integrated source of polarization-entangled photons    [PDF]

Laurent Olislager, Jassem Safioui, Stéphane Clemmen, Kien Phan Huy, Wim Bogaerts, Roel Baets, Philippe Emplit, Serge Massar

We report the experimental generation of polarization-entangled photons at telecommunication wavelengths using spontaneous four-wave mixing in silicon-on-insulator wire waveguides. The key component is a 2D coupler that transforms path entanglement into polarization entanglement at the output of the device. Using quantum state tomography we find that the produced state has fidelity 88% with a pure non-maximally entangled state. The produced state violates the CHSH Bell inequality by S=2.37\pm0.19.

View original: http://arxiv.org/abs/1304.0642