Generation of polarization entangled photon pairs using silicon wire waveguide

We report the experimental generation of polarization entangled photon pairs based on spontaneous four-wave mixing in a silicon waveguide. Using a nano-scale silicon wire waveguide placed in a fiber loop, we obtained 1.5-mu m band polarization entanglement with two-photon interference visibilities of >83%. (C) 2008 Optical Society of America.