Telecom-Band Entanglement Generation for Chipscale Quantum Processing
  We demonstrate polarization-entanglement for non-degenerate and degenerate photon-pairs generated through Kerr-nonlinearity in a nano-scale silicon-on-insulator(SOI) waveguide. We use a compact counter propagating configuration to create two-photon polarization-entangled state, |H>|H> + |V>|V>. We observe two-photon interference with visibility > 91% and > 80% for non-degenerate and degenerate photon-pairs, respectively. The experimental structure can be implemented on optical chips as an integrated source of entangled photons for future quantum computer and communication applications. 
Kim Fook Lee, Prem Kumar, Jay E. Sharping, Mark A. Foster, Alexander   L. Gaeta, Amy C. Turner, and Michal Lipson