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27 April 2024

» arxiv » 1212.0567

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Near-infrared Hong-Ou-Mandel interference on a silicon quantum photonic circuit
Xinan Xu ; Zhenda Xie ; Jiangjun Zheng ; Junlin Liang ; Tian Zhong ; Mingbin Yu ; Serdar Kocaman ; Guo-Qiang Lo ; Dim-Lee Kwong ; Dirk R. Englund ; Franco N. C. Wong ; Chee Wei Wong ;
Date:	3 Dec 2012
Abstract:	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 KTiOPO4 waveguide chip, serving as the entangled photon source and pumped with a self-injection locked laser, for the photon statistical measurements. Efficient four-port coupling in the communications C-band and in the high-index-contrast silicon photonics platform is demonstrated, with matching theoretical predictions of the quantum interference visibility. Constituents for the residual quantum visibility imperfection are examined, supported with theoretical analysis of the sequentially-triggered multipair biphoton contribution and techniques for visibility compensation, towards scalable high-bitrate quantum information processing and communications.
Source:	arXiv, 1212.0567
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