Interference from Two-Photon Sources in Silica-on-Silicon Circuits at Telecom Wavelength

【摘要】 The integrated photonic chip is a promising way to realize future quantum technology.Here we demonstrate a two-photon interference in the standard telecommunication band on a silica-on-silicon integrated photonic chip.Two identical photons in the 1.55 μm band,which are indistinguishable in spatial,frequency and polarization,are generated by type-Ⅰ collinear spontaneous parametric down-conversion via bismuth borate.The silica-on-silicon integrated chip,which has an insertion loss less than 1 dB,is a Mach-Zehnder interferometer with a thermo-optic phase shifter.A high visibility of 100% in the classical interference and 99.2% in the two-photon interference is achieved,indicating that the two-photon interference with high interference visibility on the chip is attained successfully.更多还原

【Abstract】 The integrated photonic chip is a promising way to realize future quantum technology.Here we demonstrate a two-photon interference in the standard telecommunication band on a silica-on-silicon integrated photonic chip.Two identical photons in the 1.55 μm band,which are indistinguishable in spatial,frequency and polarization,are generated by type-Ⅰ collinear spontaneous parametric down-conversion via bismuth borate.The silica-on-silicon integrated chip,which has an insertion loss less than 1 dB,is a Mach-Zehnder interferometer with a thermo-optic phase shifter.A high visibility of 100% in the classical interference and 99.2% in the two-photon interference is achieved,indicating that the two-photon interference with high interference visibility on the chip is attained successfully.更多还原