Phase sensitive parametric interactions in a $Ga_{0.5}In_{0.5}P$   photonic crystal waveguide
  We report phase sensitive amplification in a 1.5mm long, $Ga_{0.5}In_{0.5}P$ dispersion engineered photonic crystal waveguide which has a flattened dispersion profile. A signal degenerate configuration with pulsed pumps whose total peak power is only 0.5W yields a phase sensitive extinction ratio of 10dB. 
Amnon Willinger, Aude Martin, Alfredo De Rossi, Gadi Eisenstein
physics.optics