Learn More
A fourth-order interference technique has been used to measure the time intervals between two pho-tons, and by implication the length of the photon wave packet, produced in the process of parametric down-conversion. The width of the time-interval distribution, which is largely determined by an interference filter, is found to be about 100 fs, with an(More)
Near-infrared Hong-Ou-Mandel quantum interference is observed in silicon nanophotonic directional couplers with raw visibilities on-chip at 90.5%. Spectrally-bright 1557-nm two-photon states are generated in a periodically-poled KTiOPO 4 waveguide chip, serving as the entangled photon source and pumped with a self-injection locked laser, for the photon(More)