| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Interference from Two-Photon Sources in Silica-on-Silicon Circuits at Telecom Wavelength |
| Xing-Yun Li, Lu Qin, Jia-Shun Zhang, Mei-Zhen Ren, Jun-Ming An, Xiao-Hong Yang, Xing-Sheng Xu** |
State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
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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.
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Received: 27 October 2016
Published: 30 March 2017
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| PACS: |
42.50.St
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(Nonclassical interferometry, subwavelength lithography)
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42.65.Lm
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(Parametric down conversion and production of entangled photons)
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42.79.Gn
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(Optical waveguides and couplers)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 61627820, 61575191 and 61275045, and the National Basic Research Program of China under Grant Nos 2016YFA0301200, 2013CB632105. |
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