Compact Engineering of Path-Entangled Sources from a Monolithic Quadratic Nonlinear Photonic Crystal

H. Jin, P. Xu, X. W. Luo, H. Y. Leng, Y. X. Gong, W. J. Yu, M. L. Zhong, G. Zhao, and S. N. Zhu
Phys. Rev. Lett. 111, 023603 – Published 12 July 2013


An integrated realization of photonic entangled states becomes an inevitable tendency toward integrated quantum optics. Here we report the compact engineering of steerable photonic path-entangled states from a monolithic quadratic nonlinear photonic crystal. The crystal acts as a coherent beam splitter to distribute photons into designed spatial modes, producing the heralded single-photon and appealing beamlike two-photon path entanglement. We characterize the path entanglement by implementing quantum spatial beating experiments. Such a multifunctional entangled source can be further extended to the high-dimensional fashion and multiphoton level, which paves a desirable way to engineering miniaturized quantum light sources.

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  • Received 28 February 2013


© 2013 American Physical Society

Authors & Affiliations

H. Jin1, P. Xu1,*, X. W. Luo1, H. Y. Leng1, Y. X. Gong2, W. J. Yu1, M. L. Zhong1, G. Zhao3, and S. N. Zhu1

  • 1National Laboratory of Solid State Microstructures, College of Physics, and National Center of Microstructures and Quantum Manipulation, Nanjing University, Nanjing 210093, China
  • 2Department of Physics, Southeast University, Nanjing 211189, China
  • 3College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

  • *

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Vol. 111, Iss. 2 — 12 July 2013

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